Surrender
The PP's round (the same as the PPK's) transmits more energy into the target at typical pistol engagement ranges (F*cking close) and is potentially more lethal, albeit it carries fewer of them.
The Glock is not impressive and has not been approved for military use by the Ordnance Board.
The whole debate is over which pistol is best for aircrew is largely pointless; you're only given one in order that you have something to hand over as a tangible sign of surrender.