I love the Vita OS, especially when quickly exiting a game and only needing to swipe to the right to bring it's page back up and continue where you left off. It not only does it for games, but it gives this option for up to 8 programs/apps at a time, making it real easy to switch between things.
It looks very clean and it is very simple to use.
Now, I would say my phone is easier because everything is right in front of your face, but the Vita's presentation blows my phone away.
iPhone = Great gaming device. Don't agree? Who cares, because you're wrong.
Currently playing:
Final Fantasy VI (iOS), Final Fantasy: Record Keeper (iOS) & Dragon Quest V (iOS)