Two overcards vs. two undercards

[sandycove]

Is it accurate (enough) to say that any two unpaired overcards pre-flop are about 2:1 all-in vs. any two unpaired undercards?

[Nottom]

Unsuited big cards are more like 3:2 over small suited connectors

equity (%) win (%) tie (%)
Hand 1: 57.7844 % 57.57% 00.22% { AcKd }
Hand 2: 42.2156 % 42.00% 00.22% { 6s5s }

[AaronBrown]

While Nottom is correct, I would still agree with you in general. Flush and straight possibilities can skew things a bit, and if the undercards have both and the overcards have neither, the overcards' chance can shrink under 60%.

[pzhon]

AKo vs. undercards: 64.8%
AKo vs. offsuit undercards: 65.8%
AKo vs. suited undercards: 61.9%

AKs vs. undercards: 66.6%
AKs vs. offsuit undercards: 67.4%
AKs vs. suited undercards: 64.4%

T9s vs. undercards: 67.8%
T9o vs. undercards: 66.1%