We're 7 games in but the difference is pretty significant thus far.
2017:
Speight: 44/81 (54.3%), 581yds (7.2ypa), 3 TD, 2 INT. 121.9 Rating (-41yds rushing, long of 8)
O'Korn: 84/157 (53.5%), 973yds (6.2ypa), 2 TD, 6 INT. 102.1 Rating (-54yds rushing, long of 14)
Peters: 57/108 (52.8%), 672yds (6.2ypa), 4 TD, 2 INT. 113.6 Rating (-36yds rushing, long of 6)
2018:
Patterson: 109/159 (68.6%), 1,311yds (8.3ypa), 10 TD, 3 INT. 154.8 Rating (121yds rushing, 1 TD, long of 81)
McCaffrey: 8/15 (53.3%), 126yds (8.4ypa), 2 TD, 0 INT. 167.9 Rating (85yds rushing, 1 TD, long of 44)
2017:
Speight: 44/81 (54.3%), 581yds (7.2ypa), 3 TD, 2 INT. 121.9 Rating (-41yds rushing, long of 8)
O'Korn: 84/157 (53.5%), 973yds (6.2ypa), 2 TD, 6 INT. 102.1 Rating (-54yds rushing, long of 14)
Peters: 57/108 (52.8%), 672yds (6.2ypa), 4 TD, 2 INT. 113.6 Rating (-36yds rushing, long of 6)
2018:
Patterson: 109/159 (68.6%), 1,311yds (8.3ypa), 10 TD, 3 INT. 154.8 Rating (121yds rushing, 1 TD, long of 81)
McCaffrey: 8/15 (53.3%), 126yds (8.4ypa), 2 TD, 0 INT. 167.9 Rating (85yds rushing, 1 TD, long of 44)