I have several of both, I prefer the 9,3x62.

A 250 9,3 Accubond has a much better BC than the 225 .35 Cal Accubond. In fact, so does the 286 Partition.

I shoot cast in both. I have a 285 .35 cal mold as well as a 285 9,3.

On game (pigs and Whitetail), they perform similarly at the distances I have shot game at; all under 200 yds to date. On paper though the 9,3 has the advantage and I'd choose it were I hunting Elk again since my last Elk was taken at 250 yards.