There are tons of different H pickups in the world, with nearly any kind of tone you want - angry, smooth, buzzy, barky, refined, obnoxious, etc. Would be good to know what your tonal goals are.
Beyond that, there are certain things that always happen when combining two pickups. It mostly has to do with the way that certain frequencies get cancelled out and other frequencies get reinforced. Think Jazz versus Precision, for instance. A single-pickup bass will have none of these cancellations, but the twin-pickup bass will have a wider tonal palette to choose from. If you like changing tones from song to song (without rushing back to your amp or tap-dancing on a pedalboard) then you’ll like the versatility of two (or more) pickups. If you’re a “one tone to rule them all type”, well then, you can probably get by with just one pickup.
There’s a lot more to this discussion, but I’ll leave it there for now...