I prefer to use the less dangerous option. Also, supercharger tonnage depends on engine weight, so it can weigh more or less than MASC, but they're usually close.
I don't think it matters if they have equal walk/run MP. Or, if it does, that ignores a large part of what makes IJJ good. You don't NEED a fast ground speed to get a fast jump speed, freeing tonnage for other stuff. I suppose I'm assuming that a mech with IJJ or a partial wing will be trying to take advantage of that and jump most if not all of the time. That means that walk/run is largely irrelevant, and the heat decrease from IJJ is usually at least equal to that of a partial wing.
I guess I'm not saying partial wings aren't better for the movement profiles you listed, I'm saying that those are by and large not tremendously useful movement profiles to have. Take the 100-ton comparison. 13 tons versus 16 tons for 3/5/4 sounds okay, but you could also have 20 tons for 3/5/5, which is much more useful, or a mere 6 tons for 3/5/3, which is often almost as good, especially with the extra seven tons to work with.
