iTouch is an inferior cart to M3 Real, something called a "budget" cart..It has lousier GUI then M3 Real (of course, if you use Sakura) but still, it has RTS..
I would suggest you to buy an M3 Real Perfect Pack, it comes with Ruble Cart (all M3 Reals come with the Rumble), but Perfect Pack comes with GBA Expansion too.....And GBA Expansion is actually slot 2 cart that allows you to play GBA games, some homebrew games that need extra RAM, use NDS Browser (that requires extra RAM as well) and makes Sakura go easier on your microSD!