When I was waiting for parts on my disc clutch, I had to use my Hillard Flame clutch which is drum.
The difference was the drum was smoother on lock up, but a tick slower on engagement... That was it...
The disk really hammers when it engages...
The difference between different number of disks is if you are on and off the throttle a lot or on and off engagement... The 3 disk can handle the heat better... But the trade off is the 3 disk is heavier...