The materials are differnt between the WW and Micro. The material for the WW has a little bit of a softer feel to it and higher weight limit but both are very comfort.
Any net will cut down on your airfrow but I really can't tell the difference between the airflow thru the Buginator and Nano Buginator.
My go-to set up is a 60" wide Mico with the Knotty mod and the Nano Buginator.
The Knotty m od is well worth the extra coin.