I have both the WD Caviar Green 2tb and a Samsung Spinpoint 2tb (F4 I think).
The Samsung is small amount quieter to my ears.
More importantly, the Samsung has been much more reliable.
Windows 7 has been wanting to CHKDSK the WD Caviar Green about 1 out of every 10 times that my system boots, and it is always finding new errors on it. It's ~ 1 year old.
My favorite drive brands, based mostly on laptop-size performance and reliability over the past 10 yrs:
Least favorite, due to reliability problems:
Iffy, just based on my WD Caviar Green problems:
- Western Digital
I think I read that Western Digital has purchased Hitachi. I hope they don't screw them up.