Hi, Gregory, and welcome to the forum!
The closer your front speakers match each other tonally, the easier it is to get a nice seamless front sound stage. It's not critical, but it is a good thing to shoot for. Even though I bought the "matching" NHT center channel for my 1.5 bookshelf speakers, I never thought that they matched very well until I got a receiver that could do auto equalization (I happen to get a Pioneer with MCACC, but systems like Audyssey do the same thing), and then they blended together beautifully. Does your receiver have a system like that, and if so, have you used it? Just curious. I think that those systems help smooth out differences in speakers that used to be really hard to get around.