Do we need 6-8poles motors for 1/8 ep?

[TexasSP]

Technically 6-8 pole motors will provide more torque. But really it depends on what motor you use.

The neu's and other 4 pole motors provide plenty of torque for 8th scale. I really don't see what the advantage of going to 6-8 poles are going to be, especially since the market and availability is rather limited.