Awning roll-up box Thule 3200 or Fiamma 45s

[sorcos]

I would like to buy a roll-up box awning for my T6 2019 SWB
I'm considering Thule 3200 or Fiamma 45s
In both models, the probable width is 2.5 m
What will be the optimal length 2.5>2.7>3.0 m ?
Any tips, experience, product quality.
I will be installing it on Thule Roof Bar Evo.