Can you mix speaker component parts?

I put in some focal Iss components last week. I love everything about them expect the tweeters I put some hours on them hoping for them to smooth out but they are just to tinny for me I always preferred silk. But I just love everything else about them the mid bass is astounding clean punchy tight and loud so even though I have never done this I was wondering I have some Scan-speak ring radiator silks I love if I swap them will it not sound right? will the crossover in the focal kit just make them sound like the Focals? Or is there some hope it might work I've never been in this scenario so I apologize for the dumb question :\

Edit: I forgot to add the ohms and power ratings match up and I believe the Scans have a wider freq response range though.