comparing laser drones to drone swarm is apples to oranges.
Predator 1v1 beats a scorpion (same cost)
Pitbull 1v1 beats a bike squad (bikes are slightly cheaper)
MLRS moving into position, setting up, and fires kills a giga who was shooting it the whole time (giga costs 10 tib more)
Mohawk is a better gunship than the banshee and costs less. Sure, no air attack, but you have talons (30) with the same air attack as a banshee (60). So if you build 2 talons, you take down a banshee and don't lose a single unit.
Scarabs (30) get destroyed by snipers (50) and mg teams (30)
I can keep going too. But I'll stop there. At the end of the day, pound for pound, GDI is better, and this is a fact. NOD has some gimmicks like stealth tanks and tick tanks that are meh at best while almost every gdi unit found in the barracks/warfactory/helipad are all very solid choices.
However, just because GDI can usually take the solo win doesn't mean you should play them like that. Group up, cover your units weaknesses and you will be fine.
GDI is better than NOD, and that is a fact I can prove. But they do the same thing over and over. However, NOD is more fun to play. They make big explosions, run around with their speed and reposition, etc.