several have told me that it's far EASIER to right a boat from turtle without a mast (less resistance from the sails, etc.)
Those are people that have never tried it. If you get into a turtle situation... keep the mast and sails connected. The platform is very stable without a mast. It is much more stable when upside down.
I have multiple experiences with a turtled platform and no mast. Not a good situation. You need the mast and sails to act like a sea anchor / lever. The hulls drift downwind while the mast and sails drag slower. This causes the boat to roll onto its side. Then you can right it.
Without the drag and lever of the rig... it is very difficult to right. Even with a power boat. Try to flip over the hull platform on dry land. It is not easy to lift. Much, much more difficult in the water as the downside hull slips away from the lifting force. You have to trip it somehow as explained in an earlier post.
By far the easiest assisted righting is done by another boat lifting the mast head while the capsized boats crew rights as normal.
