Remember KSU's own fanbase wanted Weber out before last year's run in the tourney, I think most B12 fans would prefer Prohm if polled, there is a reason it seems KSU is almost always underrated as they were leading the B12 a week ago and still behind KU and ISU in the selection committees eyes.
I prefer Prohm but as you state as an ISU fan there is some inherent bias. Weber is a very good in game coach and gets the most out of his players and I'd say a bit better than Prohm there. I have seen some improvements from CSP in calling plays and improving the defense so I think he can match Bruce there in a couple of years. The major difference in my mind is the recruiting, Prohm has already proven to me that he can identify elite college talent, get them to commit and improve to the NBA interest level. That raised the ceiling of an ISU chances to make national noise over KSU.