Career (league rank in brackets)
Even Strength (min 2000min):
Auston: 15:38, 55.1oztf%, 1.54g/60 (#1), 2.26p1/60 (#4), 2.59p/60 (#7)
Mitch: 14:33, 53.3oztf%, 0.76g/60 (#134), 1.91p1/60 (#17), 2.41p/60 (#17)
Auston: 15:38, 55.1oztf%, 56.2gf%, 52.9xgf%
Mitch: 14:33, 53.3oztf%, 54.8gf%, 52.8xgf%
Power Play (min 500min)
Auston: 3.13g/60 (#5), 5.04p1/60 (#6), 6.52p/60 (#13)
Mitch: 1.50g/60 (#100), 4.59p1/60 (#12), 7.12p/60 (#5)
If they were both wingers it would be close, but I'd still take Auston.
But given he's a C, it's an easy call.