4x creates more connections between spokes than 3x, so in theory any big impacts are spread across more of the wheel. There are also marginally smaller gaps, yep. The wheel should stay truer for longer as there's more friction/connects to form a more solid structure (in theory).
In reality it doesn't seem to make too much difference, build quality and sourcing good parts are far more important.
4x creates more connections between spokes than 3x, so in theory any big impacts are spread across more of the wheel. There are also marginally smaller gaps, yep. The wheel should stay truer for longer as there's more friction/connects to form a more solid structure (in theory).
In reality it doesn't seem to make too much difference, build quality and sourcing good parts are far more important.