If you’re looking for the biggest smartphone you can get, without regard for portability and price, then you needn’t look any further than the Sony Z Ultra. Available in two flavors, one with Sony’s custom Xperia branding, apps, and services, and another straight from Google with an unmolested version of Android, the Z Ultra is the current reigning champ in the neverending smartphone size wars.

These identical twins, separated at birth and raised by different parents at opposite ends of the world, look similar on the outside and have essentially the same makeup on the inside. But they can’t escape their upbringings, and Sony’s Xperia Z Ultra offers quite a different experience than the Google Play Edition Z Ultra.

We’ve heard this story before: the Google Play Editions of the Samsung Galaxy S4 and HTC One hit the market this past summer, providing a very Google-y counterpart to their manufacturer’s interpretation of Android. But while the normal versions of the Galaxy S4 and One are mainstream smartphones that can be purchased on-contract from every major carrier, the Google Play Editions are only available unlocked, without subsidies, directly from Google itself.