Maara is obviously a better adaptation of charlie and is a top notch.
This movie is literally a masterpiece with excellent cinematography, Incredible story telling and some soul-stirring music that will make your heart swell with raw emotions second by second, scene by scene, and you will not regret it.
Talking about flaws, I personally think that Maara lacks the chemistry between the characters played by Madhavan and Shraddha and that there should have been an in-depth exploration of their relationship.
Anyway, kudos to the cast and crew and yes, This is definitely a must-watch.