Well, bit the bullet and bought gator blades from the local Kubota Dealer. Their opinion was they are a little better than OEM because of the blade construction and not necessarily because of performance. Mowed a bit and I could not tell the difference in the cut quality or mulching. My 2 cents and my response to my own post....
I cut Bahia and St. Augustine grass with mine and it cuts just as good or better than the factory blade no matter how long and wet it is. Maybe depends on the type of grass?
My local Kubota dealer had OEM and Oregon blades. He recommended the Oregon blades and I have to agree they cut better.
Do you think there is a significant difference in the mower decks?