In general, most users report that Zigbee motion sensors are faster than Z-Wave motion sensors. The SmartThings (2018 and the probably identical Aeon Zigbee model) sensors are pretty fast for me, so maybe you got a dud or are dealing with a hub or network issue.
Historically, I've been a fan of anything OEMed by Centralite, including the beloved Iris v2 sensors, but those are long out of production and the only thing I'm aware of that they have in stock now is their own Micro Motion Sensor. It's fast for me, but it uses a coin cell battery rather than one of the cylindrical sizes, so I'm not sure how life will compare (but even a bit less than multiple years on my Iris v2 sensors would be OK with me!). For some recent community favorites, you may wish to check out this thread:
