I have both for the same reason (FCP), and the desktop definately beats the laptop in overall performance/horsepower. I had a Macbook, and was thinking that if I switched to a MBP, I might be able to let my macpro go; but now that I switched from the MB to the MBP, that's not really the case. The desktop is definitely beefier.
Thanx for your input Sonicjay,
but that is just my problem. My Macpro is no quadcore, it's a dualcore. You have 8 cores, I have 4 cores. If I had waited three months they would have 8 cores standard, cause they upgraded it three months after I bought my MacPro. I never forgive Apple for that. I tried to go back, but you know the outcome ;o)
But I digress. Since it is no quadcore, I thought maybe that a MBP would be faster. But I guess, you have all gave me some good answers.
cheers