It sounds like you're asking about incall versus outcall maybe?
I only do incall, If you live in HK and get an outcall to your home then you're giving the person/agency quite a lot of information about you and power over you as well. I've known bros who've had to deal with jilted hookers going nuts on their doorsteps in front of the neighbors. You don't want that.
Now if you don't live in HK and are just visiting, then outcall to your hotel seems to be safe, and I've certainly BROUGHT many a girl back to my no-tell motel. But I still don't order in, because of all the fake pics, you just never know what you'll get.
As a newbie, read up on all the deets here, particularly pricing, and then go either 141, or Hotel Walk-in for your first few sessions and you'll get the hang of it (and the addiction!
) fast.