Shenmu 1 on Dreamcast was amazing for its time and place. And it had literally years of hype building up to its release. I loved watching those trailer movies.
Shenmu 2 on Xbox just looked kind of dated, port-tastic, and slow.
If it had been done using Wreckless's and/or DOA3's engine, with realtime fighting and lots of car chases, it probably would have done pretty well on Xbox.