first - there is a big difference between Ft Lauderdale & Miami. Most of the guys on RM list under both cities, but they really won’t travel between the two cities unless you’re paying a premium - and some just won’t travel at all. I-95 connecting Miami & Ft Lauderdale has some of the worst traffic in the country. I’d decide where you’ll be staying first and then focus on guys in that city. It can be difficult to figure out who is really based on Ft L & who is in Miami.
Miami tends to have more of the providers that travel internationally & more expensive. Ft Lauderdale tends to have more providers that cater to a mature clientele. Both cities have extensive choices and some of the best.