answers for both Vct and ranked would be apreciated, know how to use both just questioning
I would say no since on Ranked you can literally play anything and it will be good. Especially Abyss ive seen Astra a lot more than Omen, Ascent is honestly whatever you can do Astra/Omen/Clove/Brimstone nobody cares since it will be removed in 12 days. I personally do Astra on Pearl/Sunset/Abyss but it's just ranked my dude you can do whatever you want cause it all depends how comfortable you are
For VCT - On large maps like abyss and pearl astra for sure is better than omen for better map control. On other maps it depends on team comp and playstyle.
For ranked - In higher ranks almost same as vct for large maps. Otherwise comfortable agent is always better. For lowers ranks omen has edge as people hardly call for util and all. With omen u can do solo plays.
It really depends on map-design. Astra is good on Abyss and Pearl due to the long rotations/entries into site. Omen is good on maps like Ascent and Sunset due to the faster rotations. When we get 10.0, I think we will be in arguably one of the most balanced dome-smoke map pools:
Omen will still probably lead in smoke-picks since he is viable on Abyss. Astra can be played on all of Omen's maps albeit at the trade of the speed of his smokes and his flash.
In a short summary, Astra probably won't be better than Omen in picks still, but she has high potential if the teams/players prefer her playstyle over Omen.
Assuming you can play both to the same degree, it depends entirely on the map
Abyss: Astra is better but people will often play Omen
Ascent: Omen is better but both are great
Brimstone: Astra is better, in fact probably better than Brimstone
Haven: Astra is better but people will often play Omen
Pearl: Astra is better
Split: Omen is better, but both are very viable
Sunset: It's about 50/50 so either one works, but you will see more Omen being played just because people are more comfortable with it