Effect of more mains vs more cross, vs open pattern in the middle vs dense

2ndServe

Professional
Same racket, what is the effect of have an 16 x 20 vs 16 x 18, or an 18 x 18, 18 x 16. Dense pattern in the middle strings vs open in the middle strings but dense towards the outside patterns and vice versa. In regards to launch angle, control, spin, etc. Holding the racket constant. I have my own ideas but have never tried it.
 
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