I flew for Stan for years next door at Hyde and I'm now based at VKX. They both have pluses and minuses. For a transients here's the comparisons:
VKX is a slightly shorter ride Uber ride to National Harbor.
For both, fuel is self serve, and about the same price (advertised fuel price at VKX requires fuel club membership. Otherwise it's a $1 more per gallon). VKX has 24 hour fuel, but if you're not a member of the fuel club you need to fuel when the FBO is open. I'm pretty sure fuel is only available during business hours at Hyde.
Hyde has a slightly longer runway with fewer obstructions. It also has a little more room to maneuver in the class B cutout, should winds require a takeoff to the northeast or a landing to the southwest.
Hyde is better when winds are out of the west-northwest, particularly if they're strong. VKX is in a little valley and the winds do some really squirrelly stuff coming over the hill. It's not so bad if you anticipate it, but be ready for a go around.
VKX has no fences, is completely open. That could be either a plus or minus. It's tucked back in a residential neighborhood. The airport itself is park-like. Folks walk their dogs on airport property, cars drive on taxiways, and it's a pretty relaxed environment. The Pilot lounge and bathrooms are open 24 hours.
Hyde is fenced and extremely quiet. Folks come and go, but not a whole lot of hanging out. A ghost town is a good description. Stan does his best to run the airport, but the owner hasn't spent money on the place in well over a decade.
if you're planning on impressing anyone, VKX is a better option. As Catmandu mentioned, Hyde has Miller Farms across the street with a farmers market and a slew of sweets.
Either way, if you need any help while you're in town, give me a shout.