Weight is arguably the most impactful design spec for a gaming mouse, and the gap here is significant. The Attack Shark R5 Ultra weighs just 39 g, making it an exceptionally lightweight mouse — ideal for low-sensitivity players who cover large distances on their mousepad, as less mass reduces fatigue during extended sessions. The Razer DeathAdder V4 Pro comes in at 63 g, which is a more traditional weight that some users prefer for added stability and control. Notably, the DeathAdder includes extra weights, allowing users to tune the feel to their preference — a flexibility the R5 Ultra does not offer.
Form factor and orientation split the audience further. The R5 Ultra's ambidextrous design opens it up to both left- and right-handed users, while the DeathAdder is strictly right-handed. Dimensionally, the DeathAdder is the larger mouse across every axis — taller, wider, and thicker — with a volume of roughly 383 cm³ versus the R5 Ultra's 265 cm³. This makes the DeathAdder a better fit for larger hands or palm-grip users, while the R5 Ultra's compact profile suits smaller hands or claw/fingertip grip styles.
Design preference here is highly user-dependent, but a few conclusions are clear. Left-handed users have only one option: the R5 Ultra. For right-handed users prioritizing minimal weight and a smaller footprint, the R5 Ultra again leads. The DeathAdder counters with a larger, more ergonomic shell for big-hand palm grippers and the added versatility of adjustable weight. Neither mouse is a universal winner — the right choice depends entirely on hand size, grip style, and weight preference.