Is it any difference in quality between "Play in editor" and the one you have packaged?

I have some archviz scene that runs smoothly in “Play in editor” but when i package it it’s lagging and chopping, which is very annoying. I want to record a walkthrough (an apartment) so I’m just wondering if the quality of the scene when I press Play is different from the packaged one? If so, what’s the difference?