HDD Disk platters question help plz

I was looking at 2 HD's Western Digital Caviar SE16 WD5000AAKS 16MB 500GB with 3 Platters and Western Digital Caviar SE16 WD5000KS 16MB 500GB With 4 Platters. My question is wich HD is best and what the diffrence when having 3 platters or 4 platters.

If two different HDDs have the same capacity (and if every of factor is equal), but one HDD has one less platter than the other, the HDD with the lesser amount of platters means it might have a slightly faster data transfer speed because of the high density of data.

It's not true. Did you known about RAID 0-stripping? One data block split in 4 and write at the same time to 4 platters, it'll be more higher than split in 3 and write to 3 platters.

If only that were true. :?

Hard drives cannot and do not have the ability to read or write to multiple internal platters simultaneously. There is only one channel decoder chip on the hard drive's integrated electronics board, and it can only drive one head at a time.

Thus, higher data densities on fewer platters increase the transfer rate because more data is coming past the single head that is currently active.

RAID-0 can achieve higher transfer rates, but requires more than one drive. By the way, the term for RAID-0 is "striping", as in data is placed in a "stripe" across the drives in the array. "Stripping" is what the women down at the dance club do up on stage next to the pole. 8)

Strippers have a much lower RPM than Raptors.

However, at LAN parties, strippers will highlight your modded case far better than windowed Raptors will. 8) 8O :!: