much much less, trust me
I used comodo firewall to block windows' processes to send data to MS. Exact same settings in both windows versions
W10 (from 1603-1803): >1000 blocked messages within 5 hours
W8.1 (9600): less than 100 within 1 week
W10 v1511: much fewer than v1603, more than w8.1
W8.1 feels twice more responsive than w10 on my old laptop with 5400rpm HDD. W10 v1511 is a lot more responsive and more stable than the later versions
w10 is too busy sending data to MS => slower