If you mean stronger in terms of size I agree, but stronger doesn't always equate to better. I'd argue that the Saints front seven present a tougher challenge due to their athleticism.
Teams run against 8 in the box all the time. They set up their blocking to match up with it. We have a pass catching TE who doesn't block well and when he is taken out of games like he was the last two weeks we can't match up in the run game with a blocker on a tackler. Curtis Martin had his best year ever in 04 against a stacked box ever week.