Part of the decision depends on the size of the boat.
I have a lightweight 30 foot sloop. The sails aren't too hard to handle, mainsail
all bagged up probably weighs 60 pounds.
Assuming that all things increased linearly, a 45 foot boat would have a mainsail
that weighs 90 pounds. It would be difficult for most of us to move that around, maybe a little easier if it was only 70 pounds, and another 30 pound sail was added to the boat to make up the loss of sail area?
If you got a crew of people capable of handling sails of any size, I haven't seen a race
boat less than 20 years old that's anything but a sloop. That oughta tell you something about what's most efficient.
With furlers, lazy jacks and high tech sail cloth (lighter and lasting longer) people aren't moving the sails around in bags as much anymore, so sloops have become more popular.
And in some schools of thought, there is more difference between a sloop and cutter than just an extra sail, the mast
is farther back on "true" cutter, and these other boats are still just sloops with a staysail added.