True, Donnerson is the better athlete and bigger, but Summers may be the better technician, perhaps. I'm only guessing. I'm assuming Gute "double-tapped" the position either to give Donnerson competition or maybe push him out. Maybe there's somebody else who is an obvious camp casualty that we aren't considering yet. (Trying not to say Moore, but Moore).
Also, we are all going to have to reconsider our posts, Curtis Bolton, Javien Hamilton, and Greg Roberts have all SIGNED 3 year deals. I'm guessing that means Tramon Williams, Donnerson, and somebody else is an odd man out(Burks?). I'm not sure how easy it is to cut UDFAs, but those 3 signings alone are about $1.7-2.2M, that would be very costly considering our cap at this point if we had to pay out even a small portion of that money. I'm pretty sure Gute wouldn't sign them if he could have just invited them to camp and not paid them anything. So there was a market for them somewhere.
EDIT - Nothing against Burks, but I would be THRILLED if Gute were to cut him; because that shows what type of GM we really have. TT would let guys just squat on the roster for 3-5 years before finally replacing them, and I would respect him even more if he admitted it wasn't a good fit and had the Packers move on. Obviously Pettine would need to concur, but I would get really excited about it. It would be nice if Gute could even trade him, I could be wrong, but I feel we could probably get a 6th for him next year. Day 3 picks matter.