I havent used the modded / newer behmor so can't speak for how they are now. The old ones were pretty robust. Customer service on them, I have contacted customer service a few times in the past with some questions and never heard back from them, your mileage may differ. The hot top, I honestly can't give any real input on since I have not used one.
The prices now, they both do about the same capacity, I think the Hot Top is probably a bit better equipped for back to back to back roasting over the Behmor. The hot top has more maintenance though. Back to price, those things compared, the Behmor is significantly cheaper.
Aaron