Which iphone plan should i get?

I'm in between 2 plans for the same price a month its me choosing between an iphone5s or a apple bundle (of ipad mini and iphone4s) which is better?

Do the iPhone 5S because my dad and my stepmom have an iPhone 4S and the IOS 7 doesn't work right on the 4S… It will kick you out of apps, kick you out of camera… Etc

Do you plan on using the mini alot? If you aren't sure then get 5S because you will use that alot, otherwise go the other way.

IPhone 5S