That's a 17" CRT at 1152x864. So it's of a similar height only not a wide, which makes swapping programs over easy, though having Ultramon helps a lot.
I haven't seen it near any other monitor, but beside a CRT the CRT looks like proper black and the Acer like a more dark blue/gray. That's the compromise you make for a screen like this, I suppose. Having a program across both monitors really shows up the difference in sharpness though... it's quite a change.