Both of those lights should meet your needs. Don't have any experience with the Axioms;
but I'm on my 3 Cygolite from the Hotshot series/family. The 2 SL clips on & off easily; bend
the locking tab and pull light off. It's even possible to charge the light without removing it if
you park close to an outlet.

See the rubber cover for the charging cable input at the bottom?:
Installation can wait by 1nterceptor, on Flickr