IPhone 6s with an iPhone 7 case?

I accidentally bought my iPhone 6s an iPhone 7 case. The cameras are obviously different, but the case does fit around my camera. The camera hole on the case is a little big. Do you think the camera case difference is a big deal? Personally I feel like everyone can see the difference right off the bat thus making it look bad. Side note: I can't exchange the case.

I don't think that will work