Or, if you do some research yourself, you will find that the magnum offers a significant advantage in muzzle velocity over the .38 Special +P, even out of a 2" snubbie.
For instance, the 125 grain .357 Magnum Gold Dot averaged 1242 fps out of my 2 1/4" SP 101, while the 125 grain .38 Special +P Gold Dot averaged 856 fps out of the same gun.
On the other end of the spectrum, my 170 grain Magnum handload averages 200fps faster out of the 2 1/4" SP than the same load in .38 Special, 950 fps vs. 750 fps. That's about 345 ft.-lbs of energy for the magnum vs. about 212 ft.-lbs. for the .38 Special version. I'd say that is a significant improvement.