I am looking at two used boats,same size boat but one has a 2003 Honda 15 hp and one has a 2007 Mercury 15 hp,which one would you chose and why,both look brand new and have low hours,im just not to sure which would be a better buy,or if they would push the boat the same speed is another concern,i have a 40 hp honda on another boat which is a great motor,i think my problem is i like the honda but i like the boat that has the Merc better .