For ep2 yes, it saves multiple minutes due to being able to move freely oob.
For ep1 the steam version works, it doesn't matter at all. It was never on the version of new engine with free oob movement and as far as I know the clipping is exactly the same in the steam version. Some people have complained about lag spikes in the steam version, which might be related to having the game on installed to an SSD. So if you're having problems with that, try installing it to your HDD. Might sound a bit weird but it's fixed it for some people.