Well, the speed towards the saw is much higher... In the first video if he even felt the slightest touch of the blade and it didn't go down he would never go further.
I'm not doubting Sawstop, it seems like a great system but I'm just saying that I wasn't all that impressed by him showing it off with his finger the way he did. If he went towards it with considerable momentum like the sausage in the second video then I might be impressed, because if Sawstop didn't work in that case he would lose his finger.