I think the french purse is cuter but I have a coach wallet with the kisslock opening (I think everyone has one, it has the turnlock opening) and there isn't alot of room and its really tight. The coins don't even go all the way to the bottom of the pocket. I think you should check them out to make sure. The mini wallet is very small. I haven't seen the french one IRL.
If you want the extra space, then spend the extra money and get the French wallet.
But I must say that I have a Madison mini wallet in brown sig that holds a lot more than it would appear to at first glance. The only thing that the mini wallet really doesn't hold is change, but I put my change in a mini skinny anyway.