"Twin Outboards" is a little open ended... Size? 2 stroke or 4 stroke? A 25ft center console similar to the 255FSH would likely have twin 150s at most. Most 25ft center consoles that would compare to the 255FSH in price/size range will either have just 1-250hp outboard or at most a 300. Significantly quieter.
I appreciate the analysis by
@FSH 210 Sport, they took a good swipe at it and did provide data to compare a 255 to something with twin outboards, but to compare a Grady 325 with twin 300's to a 255FSH both running at 6000rpm is more than a little misleading and not even apples to oranges in
MY opinion. Grady is probably over $400K and 12000lbs of boat running 48mph at 6000rpm wide open. The Yamaha 255FSH is $80K and 6000lb running 42mph, just slightly above optimal cruising at 6000rpm AND the Grady is still quieter. The 255FSH will be at 6000rpm more often and for a lot longer than that Grady ever will (if ever).
@Saltwater Runner If noise is an issue for you, you may want to consider a test drive....This coming from a previous Yamaha owner that has noise issues and got a boat with a Yamaha 300 outboard to solve those issues. Still play my music just don't have to crank it nearly as loud.