The DeathAdder V3 Hyperspeed is a uniformly scaled-down DeathAdder V3 Pro. Compared to its spiritual predecessor, the DeathAdder V2 X Hyperspeed, the overall silhouette is closer to that of the Razer Mamba, with the front being the most notable modification compared to previous DeathAdder releases. Not only have the front flares been toned down, small ledges left and right of the main buttons have been added as well, where one's fingers may be rested. The left side is likewise affected by these changes, and no longer curves in as much horizontally, with the side buttons having been raised as a result. The right side has mostly been left untouched, and the same goes for the back, which retains most of the curvature of the V2 X Hyperspeed. Another change pertains to the hump. While still centered, the hump follows the right-handed ergonomic curvature introduced by the Zowie EC series more closely, in that the hump is tallest at its leftmost point. On the V2 X Hyperspeed, the highest point was located slightly more towards the right, and the left main button in particular sat a bit lower. In addition to that, the comfort grooves on the main buttons no longer are as deep. Overall, the DeathAdder V3 Hyperspeed could be described as a more streamlined rendition of the original DeathAdder, losing some of the curves, but also some of the uniqueness of the original.
As for grip styles, I'd say the DeathAdder V3 Hyperspeed is suited for both palm and claw grip. It is a medium-sized mouse with a fairly pronounced hump, which should make it suitable for most hand sizes. For reference, my hands are 19 cm long and 10 cm wide, and I found the DeathAdder V3 very comfortable in claw grip.
Dimensions
This table includes the dimensions of the Razer DeathAdder V3 Hyperspeed and several other right-handed ergonomic mice. "Front height" denotes the distance between the base and main buttons. Measurements with two decimals have been taken with a caliper, while those with one decimal have been taken with a ruler. For a full list of all measurements taken, please refer to this sheet compiled by an esteemed community member.