Some here say the new MG is equivalent to the Napa Silver, some say ProSelect. If forced to pick, I'd probably say closest to the ProSelect based on O'R's low bidder history with filter manufacturers for MG, and the PS being more a jobber filter. But that's speculation. Silver likely a bit more efficient than PS.
That said, for a standard ~5k oci, whether Silver or PS equivalent, the MG should function well.
In other words, don't sweat it.