The crew 1 does let you play more of the clunky vehicles, and therefore have a deeper well to pull from, however, so with that in mind I think I would give the overall nod to Astor if you're looking at Boros vehicles
Getting a Dusknoir into play requires first having a Duskull, then a Dusclops, finally evolving into a Dusknoir
And you can bring in all the old Amass cards from War of the Spark, too
You have to really have that drive consistently
And in Black with the Cabal Coffers/Urborg combo you can make tons of mana, and this color combo is rich in card drawing for spells like Ancient Craving and Sign in Blood as well as removal like Bedevil and Chaos Warp to have enough for making the 3/3
Many people understand this is a proxy and dont care so much, but you should like what youre paying for