are SATA drives cooler to the touch than IDE?

I need to buy some drives for a company server, to be used in a RAID
configuration. I'm used to buying SCSI drives, because I love 1) that
they feel cool to the touch when running and 2) they have a high "mean time
between failure" number (MTBF). I just hate the price of SCSI drives and
this is for a small business.

Now, I see that SATA drives have a good MTBF number comparable to SCSI. So
I'm thinking of buying the Maxtor 9 or 10 series SATA drives or the WD
Raptors that spin at 10k. They all have MTBF numbers like SCSI drives but
can someone tell me how cool or hot they are to the touch?

If an IDE (regular ATA) drive runs warm/hot, and a SCSI drive in the same
enclosure runs cool, where does SATA fall? Does anyone know from
experience touching these drives while they're running?