What each one is
Aptitude is an external recoil script: it detects the weapon, operator and attachments you are using and compensates recoil in real time, adds rapid fire, a trigger bot and peek macros, and keeps itself hidden from the task bar and task manager. It has no ESP. Zeroday reads the game externally and draws visuals through the Discord overlay, with a browser-based menu, a BattlEye killswitch and an unlock-all.
Aim and recoil
Aptitude is finished and built for exactly this. Zeroday lists its aimbot and smoothness as in private testing and recoil control in nightly public testing at the time of writing. For gunfights today, Aptitude.
Information
Zeroday only. Box, skeleton, head, health and gadget ESP with distance and FPS limits. Aptitude has none by design.
Footprint and setup
Aptitude sets up in minutes, needs no weapon selection and generates a unique build per download. Zeroday needs UEFI boot and a paid spoofer if you are already banned; it is streamproof and has unique loader signatures per key. Both are compatible with spoofers.
Who each is for
Aptitude: players who want consistency in fights and nothing visible on screen. Zeroday: players who want ESP and skins and prefer an external design.