I will admit the exterior is personal preference, as long as those that prefer the wing spoiler admit that the blade spoiler gives the car more of the classic Camaro lines....
Personally I find it makes the as end look less squished , which is what a few people have complained about in regards to the rear end.
More importantly ( for me anyway) the blade spoiler will REDUCE OVERALL WEIGHT, will reduce the laminar airflow more than that wing with add down force . In all honesty I don't see much angle to that wing.