Bill
There is a difference. In the end it may depend on where your work is being published and what size, but the detail in a file from an H25 is quite good. I may be a Phase One employee and such, but there must be a reason so many top shooters pick the Phase One back, especially when they want to stand out. Also, you may want o look at the P systems. There are a number of them that dealers will have at good prices that have been loaners for people waiting for thier P30s and P45s. I have both a Canon 1ds II and a Contax P25 and when I have shot side by side there is a difference. The best way I can say it is micro-detail and dynamic range. Let me know where you are located and I can make sure you get pointed to a dealer that will help you make the right choice.
BR