I can tell you Cripps runs just under 3 sec these days for 20 metres sprintsCripps is a handball first in and under ball winner. He really has no need for a good 20m sprint compared to Langford who needs to create space to maximize his damaging ball use by foot.
I don't think the comparison has much merit.
His preseason training season in Perth last year worked on his sprints and got his time right down