Is Lewis an upgrade over what we have?

Let me start by saying, I'm not real familiar with Keenan Lewis. I know he is from N.O. and went to OP Walker. Doing some research I noticed he's only had 1 INT in the 4 yrs he's been in the league. 1! So I got to looking and he doesn't appear, on paper, to be much better than what we have. Now, I'm asking this question seriously, so if all you are going to do is start trashing, just do not respond.

Keenan Lewis:
(2012) Comb Tkls 71 Pass Def 23 INT 0 FF 1 Sacks 1 Career INT's 1 (4 yrs)

Patrick Robinson:
(2012) Comb Tkls 64 Pass Def 18 INT 3 FF 1 Sacks 7 Career INT's 7 (3 yrs)