Start with what the store actually sells
A bundle store and a plain key reseller answer the same question very differently. Green Man Gaming lists bundles among its product types, alongside game keys, gift cards and DLC, and describes itself as both an authorised reseller and a bundle store. Nintendo Store sells bundles too, but it is a publisher store, so the catalogue is limited to its own console and its product types also cover game subscriptions and gift cards. The Game bundles and DRM-free games ranking is the fastest way to sort sellers into these groups before you read prices at all.
GamersGate is the odd one out here. Its product types are game keys, DLC and DRM-free titles, with bundles absent, and it is an authorised reseller for PC. If the word DRM-free is what you are shopping for rather than a headline discount, that is the distinction worth checking first, because a bundle is about volume of games and a DRM-free key is about how the game is licensed to run.
Platform coverage narrows the same question. Nintendo Store lists Nintendo Switch, so nothing there will run on a desktop or a console from another maker. Green Man Gaming lists PC and Xbox, GamersGate lists PC. A bundle that is cheaper but unlocks only on hardware you do not own is not cheaper at all.
Prices, billing and what the numbers hide
Prices in this category need their context attached, and the context is the plan and the billing period rather than a subscription where none exists. Nintendo Store sells game subscriptions, so its recurring spend is structured differently from the one-off key purchases at GamersGate, YUPLAY or Green Man Gaming. YUPLAY adds no checkout fee, and Nintendo Store also has no checkout fee, while GamersGate and Green Man Gaming have no fee listed either way in the same set of terms pages. A fee that is absent is a real saving on small purchases.
Do not compare a percentage discount badge against a shelf price without checking what the shelf price was and which region it applies to. Region labelling differs across these stores. Green Man Gaming shows the region on product pages, and its markets span 17 countries including Argentina, Australia and Brazil, so a key you can afford may still be locked to an account region that does not match where you play. Nintendo Store serves a much narrower pair of markets, the United States and Canada, which constrains who can buy and redeem at all.
Read the rankings and the individual reviews together rather than either alone. The Game bundles and DRM-free games ranking gives the price picture across sellers, and the Green Man Gaming review and GamersGate review set out what a buyer ends up holding after checkout.
Delivery, region locks and what happens after you pay
Delivery speed is rarely the deciding factor because three of these four stores deliver instantly, including Green Man Gaming, GamersGate and Nintendo Store. Instant delivery tells you the key arrives right away, not that it will activate in your account. The comparison that matters is who handles the problem when a key does not work, and the buyer protection answers diverge sharply here. Nintendo Store offers no buyer protection, while GamersGate, Green Man Gaming and YUPLAY each provide it. That gap is larger than any sale price difference in this category.
The legal entity behind the store is a reasonable second check. Nintendo Store trades as Nintendo of America Inc., GamersGate as GamersGate AB and Green Man Gaming as Green Man Gaming Limited. YUPLAY gives a headquarters country of the United Arab Emirates where the Nintendo Store lists the United States, GamersGate lists Sweden and Green Man Gaming lists the United Kingdom. Founding dates follow a similar spread, from 1889 for the Nintendo Store through 2007 for YUPLAY, 2004 for GamersGate and 2009 for Green Man Gaming.
Instant delivery on its own says nothing about how long a refund takes, so treat it as a convenience signal rather than a safety one. For stores where the delivery claim is not stated in the same terms, the question stays open until you see their return policy.
Payment methods and support as tie-breakers
Payment method choice is a practical filter for people outside the biggest card markets. Nintendo Store and GamersGate each list card and PayPal, so if you pay with something other than a card or PayPal you would be ruling both out. Green Man Gaming takes a wider set, card, PayPal, Apple Pay and more, which is one reason a bundle priced in a single market currency can still be bought from many places.
Support reach matters more when a bundle contains many keys, because one failure means chasing one seller about several titles. Nintendo Store and Green Man Gaming both list phone and email support, email, phone, help centre and more and email, phone, help centre and more. GamersGate lists email, help centre and community, with email, a help centre and a community forum but no phone line. Green Man Gaming runs a loyalty programme, as does the Nintendo Store, so repeat bundle purchases can earn something back depending on the offer.
The Nintendo Store review, the YUPLAY review and the other write-ups linked from the ranking set out support and payment details in more depth than a comparison table can.
Putting the decision together
Buy a bundle when you want volume and you are comfortable with one seller holding the keys for many titles. Green Man Gaming is the clearest fit in this set because bundles are a stated product type and the store is a bundle store as well as a reseller. Check the region shown on the product page before you pay, since the catalogue reaches well beyond a single market.
Buy DRM-free keys when what you want is a game you can keep and run without a store account holding the licence. GamersGate lists DRM-free titles alongside game keys and DLC and focuses on PC, so it is the natural comparison point for that goal. The GamersGate review covers the buyer protection position, which is the thing to weigh against a smaller catalogue.
Buy from the publisher store when you want one console, one account and no reseller in the chain, and accept that the price list is the publisher's own. Nintendo Store offers no buyer protection and no checkout fee, delivers instantly and covers the United States and Canada. Where you want the widest payment options and the most markets under one roof, Green Man Gaming leads on both counts in this set.
Whichever way you lean, cross-check the price against the Game bundles and DRM-free games ranking and read one full review before checkout, because the gap between a bundle store and a publisher store is not a gap a discount badge can bridge.