I see nobody has bothered to answer your very genuine question. Truth is I don't have a very good answer but I will share what I do know. About 10 years ago there was a Tohatsu dealer(no longer in business) near here who claimed to like them and it was his opinion they were relatively trouble free.
My opinion is that service/parts are not easily available in my area, there are plenty of used JohnRudes, Mercury/Mariners available so why bother. The second point is once you own it you may want to sell it at some point and that may not be easy. I would stick to the "name" brands were I you. Good Luck.