I don't honestly know. I like the location of the ICP on the later models but I also like that the early models don't have HPOP system leaks. The smoother ICP reading would also help the ICP live longer. There is a lot that needs to be changed if one was to do so. I have a 03 in my truck and have a late 04 engine that has all that is needed,but I haven't swapped it out.
The newer pumps move more oil,icp sensors last longer and are easier to change.the newer rails are said to flow more oil and dampen hydraulic pulses too.the swap involves quite a bit though.i would say all in all its worth it on a performance build or daily driver if you have access to the parts.