Yeah, if your other guitars are 25.5" then scale isn’t the factor.
The SoCal has a Floyd Rose - do the others have floating bridges? If not, that’s likely a factor, that a floating bridge feels easier to bend on than a fixed or dive-only bridge with the trem screws tight enough to hold the bridge flat while bending.
Trem springs can have a factor too - if the SoCal has two or three springs while your other floating bridge guitars have four or five, that could make them feel a bit stiffer as well. Likewise, three paralell springs (III) is supposed to feel stiffer than three springs in an arrow (/I) though I haven’t experimented extensively here. Also, some springs just feel stiffer than other for no clear reason, and some guitars feel stiffer for no clear reason. I’d bet bridge/spring configuration, though.