hi doug,
i'm not familar with foreign model codes, so i don't know from this which model is 39E.
but maybe this can already help you:
http://www.xt600.de/xt_stammbaum/xt_typenkunde.html
main differences are:
xt600 ténéré: 28 l tank, oil-cooler
xt600: 11.5 l tank, no oil-cooler
let me know when you find out!
bye
klaus
mailto:klaus@xt600.de