the sizing is always the same, an 11.5 is an 11.5 is an 11.5 from year to year
BUT
the fits can be slightly different due to liners and construction changes, but usually not so different that you need a different size, but sometimes the fit is different enough that that model might not be the best fit anymore
in your situation you have no choice but to order them in 11.5 and hope for the best