6 games match (H3) between LZ13(c0cb60) and gtp4zen (V6) 10" per move
(Sabaki 0.33.4, win10, i9-7920X, 2x1080Ti)
command line for gtp4zen :
-z 6 -t 12 -T 10 -s 200000
command line for LZ13 :
--gtp -w c0cb60.txt --noponder -r 10 -t 4 --gpu 0 --gpu 1
time_settings 0 10 1
Result : 3-3 for this match , zen won its 3 games by (early) resignation.
(in the nine H3 games in total, LZ wins 6-3)
In conclusion, on my PC, LZ is very probably 3 stones stronger than Zen6.
Take a look at the Z3 game
And now, I'll let my computer (and my flat) cool down, because between CPU-fan and GPU-fans, it's very hot !
PS. In the controversy between high-end and low-end computers , I would make a difference between
a) actually playing go : a low-end computer can be very well suited if you're not Ke Jie.
b) for computer go, to test the Elo-strength of a program, determine if it's pro strength, or such things, I think you need good CPU/GPU
The games :
L1L2L3Z1Z2Z3 !