It really depends on your friends preference. Does he want to top or be topped. Does he only want an oral fest. Selecting a TS provider is a more precise process than choosing a GG (Genetic Girl) for services.
Haven't seen Tatianna or Bella. Saw Andressa long time ago, mediocre session, small cock, and she talked way to much for my liking. YMMV, but I won't see her again.