I looked at the White Hots. They appear to be a triple seven pellet with less residue. Hodgden that makes triple seven bought out IMR powders a few years ago. They aren't going to cut their own throat. I think they are just trying to get more market share by having additional products that perform as well but have some characteristics that appeal to those who don't like triple 7, such as less of a crud ring. they are expensive but so is blackhorn
I've been using regular Pyrodex pellets and really like them however due to not being able to easily find them after hunting season this year for my new rifle I got a 100 pack box of Tripple 7 pellets to try out. I've never seen those White Hot's in person though.
I do not believe you will see BH209 in a pellet form it is a progressive burn powder and that would change the burn rate. Black and the other subs have a constant burn rate. Lee
It might be a 'tad' cleaner as it does not have the black dye added that is added to T7 nor does it have the smoke producing element that is also added to T7.
I wish they would make 'white' T7 loose powder.
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Keep on Shooting Muzzleloaders they are a Blast