Hugh, as you rightly question it is indeed a Viper and not a Vipermax.
As I currently have both said Osprey in question + a Scorpion I would have to agree that the Scorpion makes a better boat when things get rough. The Scorpion hull is simply amazing. Some of the credit must go to the extra length of the boat and also mine is diesel which makes them completely different boats.
In a perfect world I would have the Osprey for blasting around and the Scorp for longer trips. (actually in a perfect world it would be a bigger scorp with twin 300 outboards...
) However one has to go!
Different boats = different price. There is no way you can get a decent Scorpion for what I would take on the Osprey...