1915 Red Sox PC with Ruth vs 1906 W601 Tigers PC with Cobb

[Rhotchkiss]

The 1915 Red Sox PC is widely regarded as Ruth's first image on a "card" as a professional ball player. Similarly, the 1906 W601 Tigers PC is regarded as Cobb's first image on a "card" as a professional ball player.

The 1915 Red Sox PC has a combined graded population of 14+ (PSA 11 and SGC 3+ (SGC is unclear). The 1906 W601 Tigers PC is has a combined graded population of 10 (PSA 4 and SGC 6). Thus, the W601 is rarer, although both are super tough.

Yet, despite the similarities, the value of the 1915 Ruth/Red Sox PC is 10x+/- that of the W601 Cobb PC.

For example, a PSA A, 1915 Red Sox PC recently sold for $114k, while a PSA W601 Tigers PC recently sold for $11.1k. A PSA 6 1915 Red Sox PC recently sold for $564k, while there is an SGC 4,5 currently on the BST with a $50k asking price.

Why do you think that 1915 Red Sox PC with Ruth is valued at 10X(ish) that of the rarer 1906 W601 Tigers PC with Cobb? I understand that Ruth beats Cobb, but 10x?!?!