I don't have a CL-360 yet so I'm not able to post any images showing comparative size between it and the CL-180. However, Edward did send me a short (25 second) video that has both CL models in it. The purpose of the video was to demonstrate how a single Lithium 4500 battery pack could power four flash units simultaneously and provide very good recycling time while doing it. The four flashes were all set to full power.
To connect four units to a battery that has only two ports, Edward used two "one-to-two" cables. The flash units from left to right are a Canon 580EX II, CL-180, CL-180, and CL-360. Since questions have come up regarding the size of the 360, I asked ET if it would be alright to share the video here on POTN. He said that would be fine:
Of course, better images of the CL-360 will be forthcoming shortly.
Its bigger but not that much bigger. Especially considering the power.
Main thing for me is will it use the same diameter flash tube so the modifiers can be used on either unit.