Technics 1210/RB-250 vs. stock arm + fluid damper

I'm in the market for a new (used) turntable, and I'd like to try a Technics 1200 variant. I have the opportunity to buy a used SL-1210 with Rega RB-250 arm & armboard at a reasonable price. An alternative would be a used SL-1210 with the stock arm, and adding the KAB fluid damper. (I assume that the fluid damper does not fit the Rega arm, both literally and figuratively). I plan on using an Audio-Technica AT440MLa cartridge that I recently bought for my outgoing table.

In theory, the Rega arm is better than the stock Technics arm. But does this automatically hold true on this TT? And what about the addition of the damper? Does anyone have any ears-on experience? Your true-life experience or wild, theoretical prognostication is requested.