Years ago the Woodleigh 458 350gr SNRN had been suggested to me as a good candidate for the black powder express. I got a box, tried them, and I was immediately struck with how hard they were. I sectioned one and compared the jacket and core hardness to the Hornady of similar weight and design. The W bullet was much harder than the H bullet.

Following up I later learned that there was a 350 SNRN designed for BPE loads and there was a 350 SNRN designed for the 458 Winchester loads. I never ended up sourcing any of the softer W bullets for comparison, as the H bullet is cheap and easy to get here in North America.

There might be other examples of the W softs where "some are softer than others"...