The two boxes are same... in weight, content and menu. What I did:
I became encumbered after robbing a chest (most probably the gay doctor's chest kept is sleeping quarters in Act I where a cleaning imp asks me to get out becuase of my dirty shoes). So I went in BF and traded of everything unimportant with gold and kept other useful things in a broken barrel. Then I saved the game. I returned to main game. I took the chest back to BF then I transfered all the content of the broken barrel in the chest. I returned to the main game... walked one step and saved the game again. When I next moved my cursur on the next chest I found that it had the same contents plus some of its own. I took that chest in the BF for comparision just to be sure. I found that clicking on both the chests opened the same menu. No new menu appeared on clicking the new chest. I repeated the process of going back and saving. And the next chest behaved in a similar fashion. It had the same contents... same weight!
