What is better iPhone 4s or iPhone 5?

I'm thinking of buying an iPhone and obviously the 4s is considerably cheaper and has better pay monthly deals. I'm just wondering is there really much difference between the 2 phones? Other than obviously the appearence. Would I be wasting money forking out more for the 5 if the 4s is exactly the same?

Should i risk cutting my mini sim to a micro sim?

I have a iPhone 3GS but i recently bought myself an iPhone 4. I found out that i will need a micro sim as opposed to a mini sim, but i was wondering if i should risk cutting it down with a kitchen knife or something. I'm currently with vodafone and have had my sim card for about a year if that affects it? Is it easy to do? What are the risks? Am i likely to mess it up? What are problems faced when doing this? Any extra info would be much appreciated.

What are some fun games for iPhone?

I just got the iPhone 5 (it's my first ever iphone) and I dunno what games to get. I just got candy crush saga and love it. What else is fun!

Added (1). Those are all stupid boy games: ( lol
Girl games please~