These two cards sold in the same venue (eBay), by the same seller, one minute apart, and were graded the same, so all variables should be equal here.
1959 Topps Bill Henry - PSA 10 - sold for $1,136
http://www.ebay.com/itm/1959-Topps-B...item51b01ccfd1
1959 Topps Bill Henry - SGC 98 (equal to PSA 10) - sold for $167
http://www.ebay.com/itm/1959-Topps-B...item51b01cd014
Both cards look equally nice - there might be a touch of a centering issue on the back of the SGC card, or it might be tilted a bit in the case. Either way, it looks like the PSA registry can drive a 7x price on the identical card!
Full disclosure: I purchased the SGC card.