Solve time of your 3x3 VS. reduced 4x4?

[Diniz]

3x3x3
best avg5: 18.55 (σ = 1.01)
best avg12: 21.02 (σ = 2.59)

4x4x4
best avg5: 27.15 (σ = 1.35)
best avg12: 27.64 (σ = 1.40)

Pretty bad 3x3x3 for me... but descent 4x4x4

 

[Tortin]

My 4x4 times are almost double.
3x3: ~12
4x4: ~20