The sound changes when selecting 09 Mode: AMIGA/FT2 (the attack gets smoothened). Almost embarrased to report this one. 
Changing the 09 Mode to Amiga/FTII will also quickly fade all samples from 0 (and the metronome is just a played back sample), to emulate the FTII / Amiga behavior. Try playing a “sharp” kick with and without the 09 mode…
The only thing I would want to do here is separating the 09 mode from the sample ramping mode, so that you can control/change both options separately.