I put a little from a new can that I have and put a lit match to it, and then did the same with the older can, it seemed to burn a little more intensely.
That really doesn't tell you anything except that both powders burn.
I'd load it with current data starting at the "start" load and working up as necessary. Stop as soon as you have acceptable accuracy or see a pressure sign such as sticking cases in a revolver.
Unless it has red dust or a funny smell I'd trust it.