You're mixing denominators to make Intel look better. Come on man. If you're going to use the R7 as denominator for power, you have to use it for speed as well and vice versa.
So r7 is 32.7% faster while i5 uses 30% less power. Or, i5 is 49% slower while r7 uses 41% more power.
You are the one mixing the baselines. I am using the same baseline for power and performance; I am using the 8400 as baseline:
Your own graphs show that the 1700 is only 32.7% faster than the 8400 whereas consuming 41.3% more power (79.95W vs 56.58W).
If you want a more explicit and formal discussion, let Eff_A denote the efficiency of the AMD chip
Eff_A = Perf_A / Power_A
since the AMD chip is 32.7% faster
Eff_A = ( 1.327 Perf_I ) / Power_A
and with the AMD chip consuming 41.3% more power, we obtain
Eff_A = ( 1.327 Perf_I ) / ( 1.413 Power_I )
So
Eff_A = 0.939 ( Perf_I / Power_I )
or, what is the same,
Eff_A = 0.939 Eff_I
The AMD chip is less efficient. Inverting the relation, you can check that the Intel chip is 6% more efficient.