There is a good chance they are the same but you can measure them with calipers... don't measure the race but the rest of the cone's width and look at the race. sometimes they can have a wider race area depending on the taper etc... if you change one cone and measure he OLD and it is wider than it was before (or narrower) you'll know that the new cone has a slightly different geometry, you can compensate with moving spacers around... I had a bin of hub parts as I did this fairly often when refurbing old bikes.