There's only a $10 difference. I've never used a game controller and wonder how difficult it's going to be to use, I trust you can get by with only using a few of the buttons, etc. I'm concerned I won't remember what all the buttons are for. lol
How many buttons you need depends on the game.
You probably won't remember what the buttons are for at first, so keep a piece of paper handy with the game controls written down on it. Eventually you'll start remembering them.