It is comparing three models of Seagate Momentus drives spinning at 4200, 5400 and 7200 rpm. Interesting bit is a graph of speed as a function of location of the data on the disk. The 7200 RPM drive's speed was slower once past 50GB point. And even for the first 50GB, it wasn't that much faster to begin with. Unfortunately, they were comparing two drives with different capacities (100GB vs. 160GB).
The 100GB 5400 RPM drive in my Mac Mini seems to have decent speed (Bonnie++ measured around 47-48 MB/s). Should I wait for Seagate Momentus 500GB 7200 RPM drive (which seems to be extremely hard to find at this moment), or simply grab cheaper 5400 RPM version that is available at most online store right now?
I've got the 5400rpm Seagate momentus 500gb hdd installed, and imho a 7200rpm hdd would probably be noticeably louder, plus the added heat from a faster hdd. My seagate isn't any louder than the Hitachi except seeks, although I'm experiencing better application load times with the Seagate than with the Hitachi.