This has many things in common with the Vallejo version of primer. Both are acrylic (polyurethane) and are sold in the same colors. The Vallejo version does have a lighter grey. Both do not cover up details.

However, the similarities end there.

The Badger primer is much thicker and requires more force to spray. It can be strange to spray with smaller needles and may splatter. I have a 0.5mm needle on my Iwata Revolution, so it's not too much of a problem.

The primer, when dried, is also very tough and scratches a lot less than the Vallejo primer. It's also flatter than the Vallejo primer. You can easily sand the Badger primer without any issues while Vallejo's primer is pretty much impossible to sand.

It's like Badger's Stynylrez was meant to be a upgrade over Valejo's primer.