I've attached the SpeedFan S.M.A.R.T. tab results for both HDD's and the Online Diagnostic Report for one drive.
In my opinion, I believe the higher G-Sense value for one of my drives can be ignored since there are no corresponding high Read or Write errors. When my dog plays Angry Cats on my G74SX, she'll hop up and her front paws land on either side of the touchpad. I think that is the source of my G-Sense errors.
I must admit, I don't ever like to hear any clicking from mechanical storage devices. Makes me think something is about to die. I don't hear any noise from the WDC drives on my G74SX-A1.
I recommend trying the SpeedFan online report for your drives. It's quick and easy and may give you peace of mind.
G74SX-A1 - stock hardware - BIOS 202 - 2nd Monitor VISIO VF551XVT