Is a 12V or 24V ride-on better for a 3-5 year old?

Across specialist communities like r/PowerWheelsMods, the consensus is that 12V is plenty for kids under 4 or for indoor/smooth-surface use, while 24V is preferred for grass, slight inclines, or two-seater models carrying a passenger. 24V models are heavier and harder to transport, which reviewers flag as a real tradeoff.