For comparison I'll use the new DoubleTap .357's that are coming out against the DoubleTap 9X25's:
.357 Magnum 4"bbl
DT 125gr Gold Dot @ 1600fps
DT 158gr gold Dot @ 1400fps
9X25 6"bbl
DT 115gr Gold Dot @ 1800fps
DT 125gr Gold Dot @ 1725fps
DT 147gr Gold Dot @ 1550fps
For bullets up to 147gr, the 9X25 has a definite advantage. Once you get into heavier bulets, the tides change.
-Mike