We did the Barbenheimer. Saw both the movies. Not both on the same day. I hope it still counts.May be
the version you want.
Barbie wins. Barbie is pretty much a perfect movie, and you know it from the first moment.
Oppenheimer not so much. The problem with Oppenheimer the movie is that it aspires to be much more than a movie. It wants to be a complete history, alluding to every possibly topic relevant to Oppenheimer and the bomb: personal, sexual, scientific, technical, political, ideological, ethical. It wants, in short, to be a history book. And movies don't do what books do any more than books do what movies do. So as a movie it drags a great lead weight around the whole time.
It is definitely powerful and significant, worth seeing, even: well filmed and well acted, particularly in its last third, when the struggle to complete the bomb comes to completion and we have to contemplate the consequences. But there is so much crammed it, so many interchangeable young male scientist characters to introduced and name checked, so many issues and places and parties and meetings being given a flicker of screen time each.
If you want all the historical details, I'm pretty sure you would be better off reading the movie's source material, the 2005 Pulitzer-prize winning history American Prometheus by Kai Bird and Martin J. Sherwin. (Not that I have.)
And if you want to see the movie, it would be better if it were more focussed and a lot shorter.