Sorry man, but that's really stretching there. No toy is going to accurately reproduce the VF-1 actual leg transformation sequence.
However, the 1/48 allows things that the 1/55 design won't allow. Namely the ability to swing the arms out for GERWALK without uncoupling the legs and also torso twist... as limited as that may be.
And the 1/48 swing bar design allows the legs to attach in the correct spot for battroid. Again, somthing that the 1/55 fails to do.