"The company *has not confirmed this to be false*, to my knowledge, anywhere on the internet." – that's what Falbo said. He didn't deny it, quite the contrary.
I once ordered a custom shop DD with Alnico II on the 3 treble strings, and during the design phase, it was mentioned that if I chose A5, it'd be a DD/JB hybrid, because they're the same coils. To be completely honest, I don't remember if it was me or them who mentioned it – it was years ago – but it was a consensus. MJ built the pickup for me, and I still have it. It's weird that it suddenly became controversial to say it, but yeah, they're the same. Any minor differences can be attributed to material tolerances over the (40?) years those pickups have been manufactured.