in my experience, most hydro clutches aren't a whole lot lighter than their cable equivalent. In theory it can be, but the master and slave cylinders have to meet travel criteria, which is often limited by to the mechanics of the clutch. My VFR1200 clutch is Hydraulic, and it's far from a light easy throw. Meanwhile, my 250cc enduro with upgraded clutch springs is a cable clutch and I can pull the lever with just my pinky.
I also have some experience with the hydro clutch setup that was posted earlier in this thread, and they are stiffer than you would think due to the master and slave piston sizes being fairly close to the same, which means there is very little hydraulic force multiplication going on.