There is only 1 kit for each career in the embassy. The Mark X kit is identical to it's non fleet counterpart and I see little point in it other than it is "ultra rare" The later kits add an extra lower tiered power and a slightly improved main power.
Unless you are going to use the specific kit they have available, it's not that big of a deal in my opinion.
They who can give up essential liberty to obtain a little temporary safety, deserve neither liberty nor safety. - Benjamin Franklin
You can get MK XI stuff on the dilithiun store (under your minimap).
Not kits, you can't. Kits above Mk X don't exist outside the fleet embassy system.
Now, I wouldn't actually mind that, since I'm in a very large fleet that will soon have access to those kits, but the lack of variety gets me. There's only one kit for each profession, and it's not the one I like using.