I worked in Surrey for a few years, and it was way busier than working in Vancouver. If somebody wants to see you, coming in from Vancouver is not going to hold them back. However, people that live in Langley, Surrey, White Rock etc. don't really like to go over the bridge. Surrey also gets more of the Seattle demographic who are just coming up to have fun.
I'm in downtown for personal reasons, and have a spectacular luxury suite here on the water. But if I was simply looking to make as much as possible, I would definitely head back to Surrey. You can't get through a liaison without your voice mail filling up (back when they only held 10 messages)
In Vancouver, I am as busy as I want to be, while still allowing myself the luxury of being selective of whom I see. In Surrey, it was insane. It was exhausting just having to respond to the deluge of interested suitors.