Comment by defrost

It's very much the same thing, there is no single unifying "Alt-Right" central headquarters, subscription fees amd newsletter, just as there is no specific Antifa organisation, just many people and a few groups that self identify as being against facism.

On the AltRight side people might point to, say, Steven Miller and his Nazi adjacent statements, or to Nick Fuentes and the Groypers, or to Andrew Anglin and The Daily Stormer for more trad. Nazi views.

To be honest I'm not entirely sure what the leading antifa groups in central north america might be.