Hello - I’ve used both for a while. I think if I had to only buy one at this point I would buy the coin card holder. It is flatter so it fits in smaller bags just a little bit easier although it’s also a little longer than the RV. But I agree with Daisy913 that the keychain is handy if you want to hook it in a bag or attach your keys to it. The CCH’s are also coming in such fun colors, and I would love a pink or blue one, but I don’t NEED one

hopefully the feedback helped, it’s hard to know sometimes until you use one. I do like them both and use both! Good luck, let us know what you decide.