We can make 3 kinds of cast net:

Drawstring Cast Net  and  Bottom Pocket Cast Net  as well as Top Pocket Cast Net.

Below is the difference between Drawstring type and Bottom Pocket type.

1.Drawstring cast net is American Style cast net, is popular in USA and Europe,and south America

2.Bottom pocket cast net is Japanese style cast net, is popular in Asian countries

Both of these two kinds of Cast Net,could use  Monofilament Netting and Multifilament Netting.

Below are the differences between Drawstring Cast Net and Bottom Pocket Cast Net: