Is Bergen County NJ more expensive & nicer than Rockland County, NY?

Bergen County, NJ, and Rockland County, NY are right next to each other. One thing I have noticed is that the minute you cross into New York state the homes suddenly look more average compared to the ones on the New Jersey Side. Homes in Old Tappan seem like million-dollar mansions while homes on the other side in Tappan, NY seem like mini-mansions at best with more homes probably in the $500,000-$700,000 range. Also, northern Bergen County is much prettier than the southern part of the county. I also know that Westchester is a very suburban county especially north of Yonkers. I am not so sure about Rockland County but i think that the county has more population compared to northern Bergen County which has somewhat of a more rural feel.