You might could stretch it and say the EH3 is a slimmed up HTG with a higher comb and less drop at heel.
The EH1 is of the same proportions as the HTG, though a totally different grip and butt. The channel will take all you can give it.
The EH3 weighs 32oz on the nose with the mini chassis. Less the 7 oz long action chassis it would be 25oz.
The EH1 is not the "Elite Hunter" fill. It is standard fill with the molded in color. As such, it is 39 oz. With EH fill is around 28 oz.
