Although brokers "should" be very knowledgable just like realtors should know real estate and car salesmen should know cares, the truth is that some are strictly salesmen and will tell potential buyer anything he/she thinks they want to hear.
Some supposedly nautical people really don't know the difference between knots and mph. If someone tells them a boat can obtain 8 -9 knots which is "sort of" 10 or 11 mph it may become 12 + knots in the retelling.
Twin F.L. in that boat is about the best engine/boat combination you could dream of. Buy it !!