I generally don't pit Black Hole against Finishing Glaze. Wolfgang's Finishing Glaze actually has some correction capabilities using DAT, while Black Hole has Cleaner-Fillers to hide imperfections when need be.
I've found myself using both products in separate occasions while getting exactly what I was looking for because they're both fantastic products to have in your arsenal. My Mazdaspeed has a hard, yet thin clear coat, so Finishing Glaze has come in handy before to bring that gloss back while still being able to avoid removing more clear than needed.