I briefly owned a Headed Stealth..... thought it sounded Sterile and thin, simply impossible to get a usable tone out of it in a band, and I was using a Big Eden Rig (WT800 and a pair of 410XLT's)
The S2000's i've had had a lot more Balls to the tone.
Had a good few S2's and they all sounded different..... some Very good, some just OK, but all "Bigger" and carried more weight than the Stealth.
Hope this is of some use
Mark