go separate systems..
I have the same electrical setup. My wife ordered a 60 amp sub panel installed to my shed. It actually feeds both my shop shed and my office shed, since I'm only in one at a time.Recently had 3 20 amp circuit breakers added for the shop and a new Panel Box.
It could be used to clear up shop air if it’s final filtration is fine enough. Or it could be used as a portable unit to hook up to tools with no fixed location. At 1 hp it should be a 110 volt unit drawing only around 8 amps.I imagine the CFM from the 2hp DC will be enough from basically one tool at a time with a short run of flex. I want to use the 1hp if it makes sense. Hate to see it not being used... even thought about making a monster overhead air filtration unit out of it. If I use it I'll probably follow Sticks suggestion of making 2 separate units.
The 2hp DC I originally bought and had to return a few years back as the wiring/Panel Box for the shop couldn't handle the 20 amps. That's how I ended up with the 1 hp DC. Recently had 3 20 amp circuit breakers added for the shop and a new Panel Box.