It all comes out about the same, the more plants you use the less veg time required. I used a 4x8 with 18 plants in it for years and hit between 4-5#.
Less veg time, equals more crops per year in most cases.
I've since moved and have more space and plant count limits. I have to grow bigger plants. Turns veg into a lot more work. Before it was clone to cup for a couple weeks then into a 3 gallon for a couple weeks and then flip. Now I'm having to get veg plants way bigger and grow em for way longer, and on scale that's a lot more work and takes up way more space. If plant count limits weren't a thing I'd be running hundreds of plants with barely any veg. But that being said i just hit my best yield to date off big plants, over 3.5 per fixture. But I'm confident I could hit just as much or more with small plants and cut out a lot of work.