I wouldnt say the chip in the RAZR beats the Rezound (some may say it and do say it...lol) ....but....at 1.5Ghz I would think the Rezound would be a bigger difference in benchmarks and performance. Benchmarks will be a crap shoot since the screen res is higher on the Rezound. That more times than not effects benchmarks, depending on some things. I am running a live wallpaper that I heard made some phones lag and sluggish or the live wallpaper was lagging. So far havent really seen it on my RAZR. I think I'm running the same live wallpaper....not really sure.
If anything...I would say the chips in the RAZR, Bionic and G Nex are no slouch. And I dont keep up with other phones I'm not really interested in too much. So I dont know too much about the Rezound. The ROM things is a surprise to me, since the RAZR has the encrypted bootloader.