Pretty much, according to the sets, the Ring, Feet, Legs and Hands are all Sol. Neck may or may not be (so wait on that); Head, Bracelets, Earrings and Ring are Allagan.

Also, the only one that uses the Allagan body is the 493 no-belt set, so getting the Sol body isn't a bad idea overall...

Just writing out my thought process here.

Want to buy the Sol body, but I don't want it to drop from T6 then, since I'd need the Sands to upgrade it to use it if I get the Allagan body, and I don't think I'll be beating T8 for a bit still...At the same time, don't want to buy the Feet for a similar reason...I could buy the Ring, but then I have extra Tomes for a while as I wait (have Allagan hands)...