I recently bought a 1lb grab-bag of logic analyzer grabbers, predominantly Agilent grabbers. There are HP, Tektronix, EZ-Hook, ZeroPlus, Rigol and Hantek as well, plus a few random pieces like ground leads and micro-test (hook) clips.
The EZ-Hook grabbers looks very suspiciously identical to Agilent/HP grabbers, so I looked it up to see if there are rumors about EZ-Hook OEM-ing for them. In the process, I found this very useful website that tells you almost everything you can find about logic grabbers produced:
https://sigrok.org/wiki/Probe_comparison
Just in case if the website changes in the future, there’s always wayback-machine:
https://web.archive.org/web/20171011195425/https://sigrok.org/wiki/Probe_comparison