It looks to be a new version from different manufacturer.
This is the reply I got from the seller
This two kind of board is come from different supplier.
Why it's better than the old blue version? Look here.
With high speed isolate optical coupler can through max 15MHZ pulse,and not lose step and skewing
With high speed optical isolation and DCDC power supply isolation, the full protection of your computer parallel port and equipment in real,not spurious only with optical isolation
5V and reset use tantalum capacitors filtering wave what is better than electrolytic capacitor
Spindle can fit 10A replay
Use LM2567 microchip,low heat and enough power supply,more stable quanlity,and some other type use 78sereis common type
Use 5W cement resistance as feedback resistance,better heat performance and output drive wave than other board common resistance