OH GOD NO HELP RUN FOR YOUR LIVES.
Better, sorta. The compartment causes an optical illusion whereby centering it (as I have here) the roundel looks too low on the shield, but if I were to raise it, it'd make the rays in the background look off-kilter, which looks even worse.
Although I do kinda like it, it's not properly heraldic, which irritates me.
Personally, I still prefer the white horse of Kent. I do get where you're coming from with it looking a bit repetitive, and that was part of the reason I made design №3, with Dawny as one of the supporters. However, since it's of a different style to the other horses, I don't think it's that big of a deal anyway.