The Jetbeam C-LE is brighter than the MKII-X on 14500. Quality of the C-LE isn't so good on the one I have, and I suspect it won't last long on the 14500.
My MKII-X seems to be extremely good, quality wise.
Although the UI of the MKII-X might be considered a little too much, there are at least some good uses for it when using a 14500. Because the 14500 only has about 750mah, it has a limited run time in a high brightness mode. I believe Jetbeam had that in mind when they designed the MKII-X UI. For users that want the brightest single 14500 light possible, use advanced mode, 100%, but at reduced run time, guesstimated at about 30 minutes. For more runtime use basic mode levels or advanced mode at lower levels. IMHO I think Jetbeam had all this in mind, I can't think of any other reason for the complicated UI. My 1st impression of the UI was bad, but I've grown used to it and like it now.
I feel the same as coppertrail on the L1D-CE, with a 14500 it's out of regulation.
Apologies for the long post, started out as a one liner....