Solo holding a pixel angle is down to reaction time and crosshair placement, and Zekken clearly has better cross hair placement than tenz while tenz has better reaction time.
In terms of gunfight hygiene, tenz isn’t better, they simply have different styles; when it comes to spraying or strafing, tenz tends to strafe a fair bit while Zekken likes to spray, but both are good at their styles, but I have seen tenz and Zekken whiff the same amount.
Zekken consistently hits more shots and puts up comparable numbers to tenz on Jett (at least recently) while outfragging him on raze. Tenz hitting a few pixel angle shots does not make him a better aimer, that’s just a flashy shot and Zekken hits regular shots with greater consistency. I personally believe demon1 is a better aimer than both of them, though that’s up to debate.