It's like asking if apples taste better than bananas. It's better to define a scenario and ask which is better for that task.

They are both good and you would possibly never hit the limits of either.

As efficient as your algorithms and their compatibility with either. You should write a PoC for PHP and Node.JS, see how easy it is to write and maintain them and do a benchmark. Generic benchmarks are useless for your specific case and either tech might come out on top. Use the best tool for the job, don't blindly follow unrelated words.