How much better is a fireface's SOUND, than a profire, REALLY.

I'm currently using the RME/ P1 mix and it's pretty darn unbeatable for the price!
I'm getting between 2-3 ms of latency max... the PCI card with the multiface is why I bought it, the FF uses standard firewire ports. It can drop to 1 ms latency, but my pc isn't incredible. Never had a pop/ crackle or dropout with the RME stuff. Built like a brick shithouse too!