It depends on the system. A rapidly strengthening storm is more likely to go further NW. A system such as this one, slowly strengthening overrunning wave is more likely to go a tick SE. From my 20 or so years following the weather very closely I'd say 70/30 go farther NW vs SE in WNY.
Our weather is different then that in Eastern NY. Many times the primary ends up going further NW and we get into a mix, while a secondary develops off the coast and many times goes further SE. So it's tough to compare the 2 locations. Overall Rochester into Syracuse are positioned better for synoptic systems then we are in WNY. Our best pattern is a series of alberta clippers with lake enhancement in front and LES behind. I think WNY is the best location in the GL for that type of pattern.