I have sailed on Saphira. She is very quick, especially in light air. She is also quick (in cat terms) down wind. Understanding airflow over both rigs in terms of sail trim is above my pay grade, but even an idiot like me can make that boat go fast.
She's light, simple to sail and goes downwind very easily.
She's easy to furl on all points of sail because of the mast rotation.
The forward cockpit has the wheel all the way forward against the bulkhead and is very, very roomy without the pedestal in the middle.
She is a beautiful looking boat (IMHO).
The freestanding masts take up a fair bit of hull space.
You have to reef two mains, which I believe are inherently harder than a main and a sail on a furler. Saphira has furlers on both her mains, so she is in those terms easier.
There is added complexity in the bearings and mast housing, but you have some of that on a large cat with mast jack or hydraulic tension of the forestay (ala Skylark)
I think that all boats are compromises. Soma's post about the Sunreef still has me laughing, but there are a segment of people that want large apartment like accommodations on their boat and will sacrifice sailing performance for it. I just spoke with a friend who delivered a Sunreef 74 and said it sailed very well up until 10knots boatspeed and that was it's hull speed no matter the wind. Boat apparently weighs 110,000 lbs.
Me, I want to sail fast. Fast is funner!!! Simpler the better!!