You are comparing the 2 because you can't find another WR that was this raw, with this little of college exp. and this little amount of production at his pro position ever drafted in the top 15.
Top 10 picks -
Darrius Heyward-Bey - 2008 Maryland - 42 catches - 609 yards - 5 TD's
Ted Ginn JR. - 2006 OSU - 59 catches - 781 yards - 9 touchdowns
Troy Williamson - 2004 - Scar - 43 catches - 835 yards - 7 touchdowns
I mean there's plenty of other ones over the last 10 draft's, but those came off the top of my head. I just had to look up the stats for them. There's been other players taken in the top 5 that have never had a 1000 yard college season as well with in the last 5 or 6 drafts as well. These are just the players that have been taken in the top 10 as well, this list grows even larger if you include the top 15.
I imagine that the list would be probably 10-12 players deep just over the last 10 drafts if you include the top 15.
Patterson has more upside then any of the above I listed as well.