Don't think we've seen word on whether the Deluxe gloves fit on HT Vader, but maybe you'd be best off picking up the whole HT Vader and selling off everything from the deluxe minus the chest box and gloves (if it turns out they work)--though the light-up saber wouldn't work with the SS gloves.Here is my dilemma, I only want one Vader, the subtle differences aren't big enough for me to want one of each. BUT, I really like the helmet of the ANH version. I don't know how easy a parted out helmet will be, but I am tempted to pick it and hope that it will also work with the future HT ESB/ROTJ Vader when they make it. Then I could have the ESB/ROTJ version with an option to redress him for a ANH-ish look using the ANH helmet and putting the inner robes over the armor to mix it up once in a while. Yea it wouldn't be 100% ANH accurate, but close enough for me.
We saw a couple promo shots where the inner tunic was under the chest armor and it didn't look too bad. Mix that with the fact that the HT body will be better, the height will be better with the figures around him, he has the light-up saber you want, and other improvements that have been mentioned and it really seems like this might check off more boxes.
I'm so looking forward to getting this guy that I'm trying to convince you too.