Oh yes. The Ti4200 is much faster than the FX 5200, 128-bit or otherwise.
Depending on your CPU and Memory, expect around 14,000ish 3DMarks in 2001 with that thing overclocked. I got 14,321 when I had a Ti4200 with my current P4 3.2C @ 3.66 with the card @ 300/590 (core/mem MHz).
In short - hell yes, expect much better FPS in everything.
edit: I see you have a Duron @ 1.2GHz? Expect huge improvement, but not 14,000 3DMarks.
Look for a better CPU to go with that card if possible..