OK, not quite apples to apples, but close.
This evening I ran these 2 auctions:
https://www.ebay.com/itm/155085096215
https://www.ebay.com/itm/155085093904
Same card, identical descriptions, closing the same night within 2 minutes of each other. The results:
PSA 5 received 11 bids and sold for $118.50. It had 143 views.
SGC 4.5 received 1 bid and sold for $60.00. It had 35 views.
I can't imagine the half grade difference alone could count for the quadruple number of views, or doubling of the high bid.