Shaq (sorry, I just can't resist, besides your username should be RayRay living in Seattle!!
"heat soak" refers to how hot the intake gets under the hood. Different materials soak up heat faster, or get hotter - ABS, metal, alum etc.
The colder the air charge = more power. So if the intake tract that leads to the intake gets "hotter" soaking up heat under the hood - then, there is a power loss.
On a daily driver though, you really won't notice a difference.
I've said before - the Mopar is growing on me. Get the one you want to see when you open the hood - as ALL the intakes perform about the same.