If you are a subscriber, Engine Masters latest episode was about oil pans. They test factory stock and off the shelf Milidon with baffles. Basically it did make a difference of quite a few HP but all at high RPMs. I forget the exact numbers but it made a surprising difference. But, just as high RPMs.
There are other advantages but it really depends on your use and needs if it was worth it. Racing, absolutely!
PS There was a lot of information on this show. If you are not Motor Trend Subscriber it will come out on YouTube in a few weeks. This was the last video they did and I think it would be well worth watching. You can see the results on the dyno and they talk a little about theory and practicality. I learned a lot watching it.
Here is the teaser.
https://www.youtube.com/watch?v=YhG9NZOiqqo