Yes, they both are 24 Bit.

most interfaces do produce 24 bit, but how they do is the question. some do it better than others.

...

yeah, you see i have a firepod and i'm not recording in 24bits because i was told that it doesn't produce 24bit sound as well as a MOTU interface or a Digi002 and that it wasn't worth using 24bits, that it would only produce more low frecuency noise and less headroom space for dynamics, is this true?

low frequency noise would only be a result of improper down-conversion to 16 bits for cd. as for the dynamic range issue, that is 100% false, more bit-depth=greater dynamic range