I think the 57s are lower-output than most other Gibson humbuckers. That would probably translate to a bit more touch sensitivity and increased ability to clean up your tone (cut down distortion) with the volume knob.
I find high-output pickups lose a little of the sensitivity, and drive the preamp hard enough that turning the guitar's volume doesn't clean it up as much as it makes it muddier.
But more modern Gibby HBs (which I assume the other are), are likely to be a little fatter-sounding, with nice, tight distortion on a tube amp.
If you're using that Marshall 18-watter, you'll really be able to tell the difference a lot. With a solid state or modeling amp or more modern non-boutique tube amp, you probably won't get as much difference except the more pronounced midrange on the non-57s.
I like the modern ones better, but then again, I use a Strat (single coils) when I'm trying to do things where I want real touch/volume control. I use the modern ones to blast the rock, and that's what they're way good for.