Kurmasana vs Uttana Kurmasana?

reading Gheranda Samhita…it is clearly identifies these two poses… do u know what is the difference? same thing with Mandukasana and Uttana Mandukasana…

Uttana is a bend forward…so uttana mandukasana would be something like balasana with wide knees? and kurmasana is already forward bend…:confused:

also it mentions Sankatam and Garuda separately…but they look like a same pose…:?