Lol how are you about to say that comp sci is a toss up?
Berkeley isn't in the stanford/mit/cmu undergrad triad, but it is as close as you can get. Also, Troy Bolton went to berkeley.
I mean, he should go wherever he wants, but undergraduate programs at Princeton are essentially universally stronger than Berkeley. If he wanted to go to Berkeley (or anywhere else) for grad school, Princeton will help him get there. But yes, Berkeley probably has stronger graduate programs in comp sci than Princeton.
And the argument xyz went to School A holds little water. I could just as easily counter with an argument saying xyz successful person went to Princeton and we would never get anywhere.
Edit: I just looked up who Troy Bolton is. The above still stands, but is just less relevant.

















