I don't know if you are aware that Yamaha has a performance bulletin out on the skiff running their 90hp. Search their website for more info. on this.
It's hard to find a bad review about Suzukis and the ones that I have read traced their problems back to simple fixes like kinks in the fuel line which would cause any manufacturers engines problems. Common traits of Suzukis are quiet, low fuel consumption, and very reliable.
If you're interest in max. top speed, I suggest you run the calculations on which engine, lower gear ratio, and prop size gives you the best results. They are probably all within a few mphs of one another in their optimal cruise/mpg range. There might be more of a difference if you plan on running at WOT most of the time in which case maximum pitch and rpms (at the prop) will win that race.