I have the original 4-bar (the Flex added the ability to add some additional lights to the other side of the bar and you could position it anywhere on a pole, not just the top). I like them a lot .. fairly bright (the new tri version is brighter with bigger LEDs) , easy to control, and look clean.
I've seen the jelly PARS and didn't care for the translucent shells that glow, but that is just personal preference, some may prefer that .. they work basically the same.