^-No one willing to postulate on a Vulcan/Betazoid Hybrid?
well if humans can find it hard to stand betazoids... (lwaxana, picard.) I can just imagne how much Vulcan's can stand them.
Though if they did get togther, the abilities could be separate. The distant empathic ability like Deanna, and then the mind melding ability of Spock. I didn't notice spock had any diminished ability frm being half human so I don't exactly know what that means. Both telepathic communcation could be experienced differently.
Or like it was said above, the ability could just manifest it self as the the abilities combined to make a stronger power.