Personally, I found that the Sizzix dies don't seem to be as robust. I had bought some Sizzix dies because they were a shape I wanted and were less expensive. I accidentally overloaded them and bent the cutting surfaces. I have overloaded Accuquilt dies and usually I just can't cut because there is not enough room.
I do recommend visiting Ebony Love's website if you want more info (
https://lovebugstudios.com/). She is an authority on the different dies and has written a book about the different dies.