Or, ask yourself... would today's Super Bowl champ Packers be able to beat the 85 Bears? OF COURSE. Every player and every position is probably 20 pounds bigger, or a lot more weight on the line.
They jump higher, they're faster in the 40 and on the field, they make tightrope catches that didn't happen back then.
It's like this in EVERY sport. From bodybuilding to NFL to NBA to everything else. Better athletes would win the series.