I've always enjoyed the majority of Bieber's music. I've also known most of the story of how he became famous, a lot of it being a testament to the power of social media and the internet. I did learn from the movie, however, that he started with a lot of natural talent and fostered it with a little perseverance. No lessons, not the most musically immersed of settings and yet he clearly had a knack for rhythm and vocal inflections. While many would argue against the concept of natural musical talent, I'm a firm believer in it- more would even argue that Bieber has it, but I don't think that many would argue that he has the talent of being an entertainer. Either way, in a few short years and through the right opportunities, he's blossomed into this cultural force to be reckoned with.
Now the musicians in Le Concert had a dramatically different background. As depicted, the classical musician spends their entire life seeking mastery of their instrument. When the Communist regime forces their disbandment, they are forced to find oddball jobs to get by whether it's driving an ambulance or a taxi or working at the street market. Thirty years later, when the maestro comes back to collect them they are old, rusted people that you'd never give a second glance at on the street, but with an instrument in their hand they can put out majestic tunes. It's a beautiful idea, much of it centered around musical mastery and maintaining identity through hardship.
I find that one of the more interesting aspects to compare is the induced type of fanaticism. As I said, I like the stuff Bieber puts out, but most certainly not as much as some of the teenage girls that go to his concerts. From some of testimonies in the movie, the girls love him because of his image and how they feel like his words are directed at them... or the hope of such at least. The passion for classical music is something dramatically different. The prerequisite of a taste for refinement is often confused for elitism. Without words, the impact of instrumental orchestral music is left to the listener to interpret- left for them to feel it as they wish. The strength of such passion is illustrated in that it can be forced underground for thirty years and come back out as beautiful as ever. I think Bieber is seventeen right now.
I just wanted to put forth these observations and recommend that you see both of these movies, as they were both very good. There's certainly room to enjoy any number of styles of music, but to deny that there are conflicts in their ideology or social impacts would be ignorant. For the sake of self reflection I, at least, found watching them quite useful.