While I agree with you overall, I should say that, IIRC, Stormtrooper MP40s are indeed better than Commando stens and so, while I haven't really tested it, a Stormtrooper squad can probably win vs Commandos fairly regularly.
Not quite, Commandos win quite handily, the extra model is huge:
https://www.youtube.com/watch?v=xZyrGksrhjg (Commandos won 11 out of 12 times)
Stormtrooper MP40's have 18.69 close range dps and Commando Stens have 14,133 close range dps, so Storms are indeed better per model, but note that Commandos have an ambush bonus of 50% accuracy for 5 seconds, that will almost guarantee a win against any Axis squad when camo is used.