[Flexradio] Couple questions about Option>Window Filtering Algorithms

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There are algorithms from Blackman to Parzen.
To tell the truth, I haven't a clue about them.

I can't honestly see a difference in the filtering/noise reduction etc. etc.

Question 1. how do they differ?
Question 2. for a guy like me, living in a high noise urban setting
who's interests are contesting and dxing,
Which of these would be most appropriate?

Question 2. is one better against certain types of noise than others?

I've read the manual, but I really don't understand what it says.