Thanks. That is what I also believed but seems a lot of people have told me there was a change. I myself see no visible difference other than the top as you say. The 1990 has the powerslot and the 86 has 1:1. I have noticed that when driving the 1990 boat without anyone else in the other seat that the 1990 boat needs weight in the boat on the other side to make it level. The 86 seems to be level or at least a lot closer to level with just the driver. I wonder if the powerslot drive train makes that difference?