It's great you found a ride that matches your riding style/weight. My wife has a megatower and tallboy. She is so light that I outfit them with almost the exact same spec. The weight difference is only about 1.5 -2 lbs. Despite it being only a small weight difference, she notices the added squish and wheelbase of the megatower when doing long technical pedals. I think the added suspension and wheelbase plays as big a roll as weight. Getting out of the saddle on the megatower robs her whereas on the tallboy it rewards.
On a related weight note, can someone explain why 12 speed is popular with enduro or North shore riders? The cassettes are substantially heavier and no one ever actually uses the smallest third of the cogs. Just get a small chainring and 11-42 11 speed cassette and you are good.