I upgraded my trailcraft profish 4.5 with its merc 60hp 4 stroke and I use the same amount of fuel in this boat as I did in that one. Cost us about $60 for the 3 days fishing which is not that bad considring where we went.
The downside is the effort needed to reverse the boat on the leccy but thats pretty much sorted now. 100% of the leccy speed fixes that problem but you just need to be able to control the boat through the widow makers which can get scary.
This is one sport that both boats offer advanatges over the other, but that is really only dam specific and Mondy being one of them I guess.
Cheers
Lee