Actually, it doesn't look like either one of those. I also checked HP's website for the HDD spec for this notebook. It sez:
80 GB (5400 RPM) Hard Drive (SATA)
Since I'm writing this on the machine in question, It'll be a bit before I can take a foto and upload it. But I will do that. Thanks.
Also, FWIW, the new drive I bought is indeed identical to the above-linked SATA jpg.