Elway
1984 - 380 attempts, 56% 2600 18/15 76.8
1985 - 605 attempts, 54% 3891 22/23 70.2
1986 - 504 attempts, 56% 3485 19/13 79.0
1987 - 410 attempts, 55% 3189 19/12 83.4
1988 - 496 attempts, 55% 3309 17/19 71.4
1989 - 416 attempts, 54% 3051 18/18 73.7
1990 - 502 attempts, 59% 3526 15/14 78.5
1991 - 451 attempts, 54% 3253 13/12 75.4
1992 - 316 attempts, 55% 2242 10/17 65.7
1993 - 551attempts, 63% 4030 25/10 92.8
1994 - 494attempts, 62% 3490 16/10 85.7
Marino
1984 - 564 attempts, 64% 5084 48/17 108.9
1985 - 567 attempts, 59% 4137 30/21 84.1
1986 - 623 attempts, 61% 4746 44/23 92.5
1987 - 444 attempts, 59% 3245 26/13 89.2
1988 - 606 attempts, 58% 4434 28/23 80.8
1989 - 550 attempts, 56% 3997 24/22 76.9
1990 - 531 attempts, 58% 3563 21/11 82.6
1991 - 549 attempts, 58% 3970 25/13 85.8
1992 - 554 attempts, 60% 4116 24/16 85.1
1993 - only played 5 games
1994 - 615 attempts, 63% 4453 30/17 89.2
The only thing Elway ever beat Marino in during that 10 years was throwing less picks, with less attempts and in 1990 he had a 1% point higehr completion percentage.
Thats it. Marino was a better in every other years on every other stat.