Thicker than an RG or a DBK, a little (very little) thinner than a Jem VWH´s (i think it´s more on the neck profile) which is the same size than a 10th´s. The thing on this necks is the finish, the 10th´s unfinished, the feel is great, the jc is (not completely sure) unfinished too, but not the same felleing, the 10th is "rougher". The JC´s also has two bubinga stripes which give diferent feel and the frets are stainless steel made.
I also have a 90 HAM, the neck is rg-like, very thin, and the finish is like satin, with a bubinga stripe. Faster, but i feel more comfortable with the rougher and thicker necks.