Is the 9501's BC a botak fellow?
Btw speaking of SD, SBS593G is a problematic bus but the AC
is strong and good.
Sv 119 route is quite short and there is a few BC that will
drive slowly. 
One BC told me SBS9364S is better than SBS9298A 
yea. botak guy. lols. the only bc tat i know of that will put
steering wheel cloth on the wheel b4 driving. haha.
as for 9364 erm erm erm...
maybe its been fixed so its beter as of now, but a month before
i cant say the same.. it was horrible