Koenning has been DC at one big school, Illinois in a period which produced the worst Big 10 offenses of our lifetime. He was 15th in scoring defense in his second year but 43rd in his first (again, with the in the worst Big10 we are ever likely to see.) That's your resume - other than Troy and he's your headliner. Grantham was a coach in the NFL for 10 consecutive seasons. Objectively, that has to make a difference. You don't have that kind of longevity at the highest level if you don't know what you're doing.
As far as Gonzales -
I you had no money in your hand and I gave you even a $10 bill; that's a huge difference. I think he's much better than what we have - and already understands and can coach receivers in the system being installed. You can hate the Mullen hire (I do) but the fact remains he understands the system. He has succeed with Florida receivers in the past under this same system. You can complain that he didn't succeed "enough" for you, but you can't say he didn't. As bad as the system was at LSU toward the forward pass, his guys were still light years better than the crew we have fielded under Dixon. Yes, it is a huge upgrade. You can blame Nuss if you want for the WRs not getting open or the QB not finding them - but the knife cuts both ways. Is it the system or the coach? His guys have done well in their systems based on what they were being asked to do. Dixon's have not.
The last word is yours, because neither one of us is changing the others mind. I don't think Koenning is better than Grantham - that's my opinion. Moreover, with the early signing period time is of the essence. SOS did plenty of stuff to rub the other team the wrong way. If I wasn't a Gator I'd probably think a lot of it was classless. That being said,if it was a blind resume, I'd argue this one isn't even close. Another poster mentioned Marquand Manuel; which sentimentally I love - but I'm not sure I want his first DC job to be us.