How similar are the Echo Pre8 and the M-Audio 2626?

[777funk]

I see that they both use THAT1510 preamp chips. I'd guess all the major differences besides would be converters. Sound wise are these similar units?

 

[k brown]

I've just the other day compared the Echo AudioFire 4 with the ProFire 610 (both have THAT1510), and I found that the ProFire sounded smoother, fuller, a bit more 'spacious', and resolved reverb tails tails more completely.

The M-Audio Fast Track Ultra (not the Pro) also has 1510s; it was third in my ranking (a bit 'coarse' by comparison) .