Variable section swept cant control surface boundary condition, not as flexible as Boundary Surface . Obviously the real thing is this world does not consist of single surface , as the mouse you had done earlier . The thing you had did "look" correct but i think it does not look like a mouse ether . so dont bear too much with VSS (variable section swept ).
Boundary surface can create high quolity surface, depend on your skill, the way you do it, the quolity of curve you use and many other factor.
Just my simple opnion since i dont want you to confuse the new guy who just start learnign ProE, they will get suck when try to create any thing with VSS as you say .
No need to sorry , just to share opinion, actually i had learn this from comp.cad.proengineer , because my self had such confusion before . Nice meeting you .
I will try to type using Chinese, after i get the Chinese Star installed, my typing in Chinese are too slow. Sorry evrybody.