The Lightray has ST mounted weaponry which is not only a difference, it is a good thing. LGH-4Y has 2 hardpoints in each ST e.g. Having an empty arm means you can strip it, which is not an option for the Crab.
If anything, the Lightray is more like a Bushwacker -P2 with much better energy hardpoint distribution and higher engine cap. And that sounds just lovely, especially for me as a huge fan of medium Mechs.
Edited by FLG 01, 29 November 2018 - 01:08 PM.