Different role models for different outcomes for sure. With same goal, you want to be sure that they both clearly define the similar outcome There would be no problem with that. If they have two very unique styles (e.g. in humour, slap stick v dry) you might have a problem.
The best way to find out is try it and see. You'll notice whether you're moving closer toward the goal or away from it within a couple of sessions.
Alex
