WAP AC vs CAP AC

Anybody willing to share experiences with WAP AC vs CAP AC?

I did a quick bench and the CAP AC is much faster running bandwidth test.
But the WiFi throughput is about 30% poorer in my setup with a MacBook Pro (802.11ac only, 3 chain) with the CAP (802.11ac only, 2 chain) than the faster WAP (802.11ac only, 3 chain) even that the connection speed is the same.
Also my CAP AC (802.11at powered) gets much hotter and does smell like some capacitor is doing hard work.