I am not sure, but let me tell you , xbox is most likely to crash on you(after all , its a windows brother😛) . What is good is that I believe you get a 3 year free warranty and replacement for your 360 if it goes RROD. It only takes a couple of weeks to fix it.
Basically, if you buy 360 today, you are covered up until almost the next console generation is out. If any thing goes wrong, its just a 2 weeks wait. So thats alright.