Respectfully, I think you are missing my point. I am not saying "why" the bearings or arbors on Sawstop are bigger (you are right in that argument why it should be bigger). I was trying to say you can have well designed machines built overseas that are better than their competitors built here in N.A and partly refute the assumption that the ones built here are beefier/more heavy duty/etc.
BTW, I'm not going to get into argument if unisaw or powermatic is better or not. We can have our different opinions.