Netflix is using H.265 with adaptive bitrate encoding if your device supports it, what codec is Apple using? Simply comparing bitrates is outdated.
With my browser (chrome) it was H.264. Still, I'd take 6 Mbps H.264 over 1.5 Mbps H.265 any day. I'm sure the apple stream was VBR as well - I tried to pick a representative/average segment to do the quick calcs on.
As a comparison I'm typically getting like 1500 kbps from Netflix on a 1 gigabit per second connection on their "HD" plan.