Hopefully more experienced people jump in and help you with this but I’ll answer based on simple logic.
Are you seeing good gains on tbol at 80mg? If you are then why change it? 100mg should be even better (sounds like a pretty high dose of tbol though). The only reason I could see switching to dbol making any kind of sense is if your trying to absolutely maximize weight gain during this cycle. But the gains you get from 2 weeks of dbol will likely fade quickly as it’s known to largely be water.
So from what I’ve learned reading on this site, I stick with tbol and continue trying to gain real lbm that you’ll hopefully keep post cycle.
Good luck.