If you're only talking max hp you would be correct, BUT:

Is this $775 engine heavier than a $1200 twin 80, I think not.

Is a 80cc single as smooth as a boxer 100cc twin, no way.

Will this fit in a smaller round cowl than a 80 cc single? It fits my Lanier Yak 54 better than the DA50cc single that used to be in it.

I'll put a link on LS web page to 3W for guys that are willing to pay that extra $600 to get the most power, but there are some guys that would rather save $600 and let you have bragging rights to having the biggest one.