Re: Hunter 460 or Passage 42 ? Which to buy
An inmast main sail will not have any battens so will not 'set' as well as a sail with battens. This means less drive and it will not sail as close to the wind.
Also inmast can jam it often does this with most of the sail still out. You have to learn the idiosyncrasies of your system.
Personally I much prefer slab reefing. Less to go wrong and I stand a chance of fixing it on passage if it does. I am 66 and single hand a 44 ft cutter on open ocean passages.