I struggled with this same conundrum over in this thread and I’m glad I went with the 26" when I finally pulled the trigger on an Oracle. It all came down to tire selection and availability for me. If it’s weight your concerned with, I would venture a guess that my 26" Oracle retrofitted with a 2.5" tire and Freeride 1.2mm tube would be nearly as light as the 24" Oracle with the 3" Duro had I not fitted Moment cranks and big platform pedals.
Funny to see how this thread got resurrected. Almost like it was a bot. There are better threads on the subject out there, most of which were already brought to the attention of the OP. Anyway, I’m glad I went with the 26" and my trails are mostly technical. Not that I have much to compare it to as I only had a 24" Nimbus MUni for a brief period of time.