There's more game. I wouldn't expect a great deal of extra game play, but maybe about 30 minutes extra to get through. Some games are more generous and have a longer extra game.
Do any of you buy the iPod/ iPhone versions to play on the ipad because they are cheaper when they have so many on sale. And only buy the ipad versions of those you are sure you want with better graphics?
When big fish use to have the .99iphone/ iPod and 1.99 or 2.99 ipad Xmas sales I would buy only ipad versions and many of them. Now with them putting out so many games during the year and a mediocre sale it's hard for me to justify spending 3.99 or 4.99 on so many. So I try to figure out which I will buy the iPod version and which I will buy as ipad version. Also it's hard rummaging through their page to see all the games and the discounted IAP price.
I've downloaded a couple of newest games (demo) and both of them aren't optimized for Retina. Looks terrible on my iPad mini Retina. So no money from me
Strategy guide is included and sometimes their is a bonus couple of extra scenes. Some will have some extra achievements or ability to have some replay looking for collectibles. Not worth extra dollars, but ok when it's included.