I have a T2 and T3 arriving on Tuesday, I had Manners send me these two as test stocks for balance and feel. I was planning to take pictures and post my observations, will let you know what I measure.
Good idea to test drive the Manners if you've got the time, actual feel in your hands will help you make a decision. I tried a EH1, EH2, & EH3, as well as the A3. Helped me decide.
I'm getting around 2" on my Savage EH1. It is a big grip IMO, the T4 feels much better in my small hands. I got a Tikka build coming up so might end up with a T4.
I currently have two A5s and previously owned a T2; I equally liked the T2 and A5 though I thought the palm swell on the T2 was just a hair wider than the A5.
Admittedly I'm a bit surprised to see the EH-1's grip is as wide as it is, though I'm not sure 0.15-0.20" is a dealbreaker.