The green Flightstick has 3 things different from black microRadar stick
(1) Antenna connectors are different. This problem can easily be solved by purchasing an sma to mcx adaptor for less than $3, free shipping, no VAT (please see link to Aliexpress in my previous post)
(2) Green flightstick has builtin filter chip, the black micro does not have. The filter improves performance by blocking Cell/mobile signals particularly in urban areas. Very strong RF signals from Cell phone towees can overload dongle and make it deaf to comparatively weak signals from aircrafr. The filter removes the strong Cellular signals. Please see the thread "Do I Need a Filter"
Do I Need A Filter?(3) The green flightstick has a builtin LNA (Low Noise Amplifier), the black micro stick does not have any LNA. The LNA amplifies weak RF signals from faraway aircraft which are otherwise so weak they are below the noise floor, and wont be processed. This amplification increases the range.