P14s G5 Intel Arc vs RTX500Ada battery life

Build Your Own model is finally available for P14s G5 Intel. What I'm curious is the battery life of Arc vs RTX500Ada version.

I'm asking a naïve question: intuitively, battery life is expected to be longer without the dGPU. But I'm wondering what if RTX500Ada is more energy efficient than Intel Arc? If all the other specs are the same, which model do you guys think can have a better battery life for daily work (Win 10/11, Web, Office) ?