'Better' - a nonsense term that should be avoided.
A good whippet will be 'better' than a shitty whippet x, and vice versa.
And what does 'better' mean anyway, catch more???
Dogs are individuals.
Whippets have great feet as a rule.
But pretty thin skin.
In comparison to a beddy x, i would say, feet just as good, faster initial speed, more stamina over certain distances, and comparable stamina over a night, coat/skin in general much poorer.