Queue Tree or new Simple queue for best performance

Which is better in terms of performance
for limitation users:

  1. Address-List + Mangle + HTB + PCQ
    or
  2. New Simple Queue from ROS 6
    ? (a)

It is about 1,500 PPTP users per each server x86
(iCore7 and network i82576)

18x2 Mangle rules and 18x2 Queue child

Mangle mark and queuing - occupies the largest part of the resources CPU

I have tried different tips and configuration - no difference in principle

On the same hardware - other assemblies Linux does many times more pps…

Why (b) ?

http://forum.mikrotik.com/t/why-simple-queue-is-better-then-queue-tree-in-ros-6-x/67974/7

thank you

great response
Q. - "Simple Queue or Queue Tree in ROS 6.x?
A. - “Well there is only one way to find out for sure…”

)