This is 1.5x more meat per tooth.
I went with 6mm-wide GT3 (aka 3mm pitch GT2) from Openbuilds, which offers
(R3_GT3/R3_GT2)^2=(0.85/0.555)^2=2.345588832
…that is 2.35x more meat per tooth compared to 6mm-wide GT2 and according to them:
“great for use with Nema 23 size motors where deep tooth engagement is a necessity”
PS. Changing pitch also means that $100 & $101 values change from
(200step/rev * 8microstep/step) / (20teeth/rev * 2mm/tooth) = 40microstep/mm
to
(200step/rev * 8microstep/step) / (20teeth/rev * 3mm/tooth) = 26.666666667microstep/mm
(assuming 1/8 ustepping & 20t pulleys)