How are these different than the RGBW chasing halo pods that are on for $119?

Hi,Thanks for your inquiry,the RGBW chasing halo pods is 20w,this pods is 40w,It'll be brighter,So its more expensive.

I have rgb halos installed in my truck already and they look to use the same remote and harness as the ones pictured here. Could I wire these pods in to my exsisting harness so that they would all run off the same remote?

Yes, you can if you confirm use use same app magic led

I have rgb halos installed on my truck and the remote, reciver look the same. Could i wire these rgb pods into the same harness and run them with my existing receiver/remote?

yes, do you get same app called magic led, if so, you can use one app to control all lights

Is it possible to just get the light bar only?

Hello, yes, please check this link of RGBW chasing halo light bar, Straight chasing light bar https://www.vividlightbars.com/collections/rgb-chasing-halo-straight-light-bar, Curved chasing light bar, https://www.vividlightbars.com/collections/rgbw-flow-chasing-halo-curved-light-bar.