AFAIK they're essentially the same box with no specific problems. Neither of them is great in the cooling department and could do with some extra help when you add big tyres and lots of weight. AFAIK there's no lock up kit option for your box though and that's something that can be a big help by holding it in 1st but manually locking the TC. When the TC is locked there is negligable heat produced, it's all the slipping of an unlocked TC that causes the heat plus as the TC's get older I believe they get slightly less efficient making the problem worse.