Reggie Wayne was rated the 214th best WR in the NFL last season. Jennings? 65th.
I'm surprised on both ends of that statistic, honestly.
According to Pro-football-reference:
2014 stats
#47 Reggie Wayne - 64 catches for 779 yards and 2 TD
#59 Greg Jennings - 59 catches for 742 yards, and 6 TD
To me, they are the same player. Reggie Wayne is 5 years older. Jennings hasn't been productive since 2011 (949 yards), Wayne since 2012 (1355 yards).
Based on nothing but observation, I'm not sure one gives a major advantage over the other.