... OK there's now a fair amount of evidence that the Yamaha 4OP FM Synth used as a source for several of the ST-01 samples is the DX-21 which is known for it's superb bass patches - Solid Bass (later known as Lately Bass) is found on a HUGE number of dance tracks. Shame the percussion wasn't Roland 808 / 909 - now that would be easy to identify!
Don't let anyone ever tell you FM is Sh*t or old hat - as ever it's the way you use it. Synths are not like PCs - it doesn't matter if its 3 weeks old or 30 years old - it just has to sound good.