Here's what I think:
Cobb played here during the 2008-09, 2009-10, 2010-11 seasons and his overall yards during those 3 years were 2974 yards and 35 touchdowns BUT Cobb played literally every position. RB, QB, WR. You name it and I think that helps him in this argument. He was basically our only offensive pulse in those 3 years.
BUT Cobb's freshman year he only had 513 yards and 9 touchdowns but he was consistent, he did it year in and year out.
Snell has only played in 9 games (about to be 10 vs. UL) and has 1006 yards and 12 touchdowns BUT he doesn't have any receiving touchdowns or yards. Cobb did. Yes, it helps Snell's case because he didn't play in the first two games. Snell has definitely had a better Freshman year than Cobb but I'll look at this argument in 3 years. If Snell can be as consistent as Cobb was over the next 3 years. That'll determine who wins this argument.