mov versus mp4 for recording, editing and publishing

I have been doing my homework and I still cannot arrive at the right answers.

Let me start with what I know already.

People in blogs online are saying that mov and mp4 are both containers and the contents are the same/interchangeable.

If mov uses one format to create video files and mp4 uses a different format to create video files, therein lies the difference.

I heard in a video that mov compresses more frames than mp4 and mp4 interpolates the in between frames more.

I am not sure if this is still true because both formats using the same bitrate create the same size file.

My question is... When blending two mov videos "or" two mp4 videos together in Premiere, which video from what container will blend using less computing headroom?

I like to add Prodad Vitascene effects and add Premiere effects.

I have an i9 12 core PC with Nvidia 1080 TI but I can still bring it to a crawl with too many effects.

Which video container files will be less processor intensive during editing and allow me to preview the edits to some degree without bogging down the system?

My Panasonic HC-X1000 will record in both mov or mp4 at 4k 60p with 150m

I assume the files will pretty much look exactly the same and be pretty near the same size also...

But will they mix and respond the same in Premiere when trying to blend them together?

I have had one youtube video I watched say that I am better off setting my camera to record to the mov container file and then edit it in Premiere and export it as an mp4 for viewing and upload. Why?

How does this mov file respond to editing better and what are the reasons?

And what about metadata?

How is that handled in both cases and what are the pros and cons of each file container?

I have never really had problems editing 4k 60p with MP4 files they seem to work fine in Premiere but I have not tried using mov files at 4k 60p and compared the editing experience?

The online info on these file containers are scant and not very reputable.

One video this person says look the mov files make the file darker because they edit your files! I would assume if both are compressing the video they are both "editing" the files.

This is where the question of metadata comes in.

Will I get a better editing experience using mov files over mp4 or should I just stick with mp4 throughout the whole process?

I get the impression that since Quicktime player was discontinued that mov file are not getting much development or love from Apple.

Mov files are more proprietary and I am not sure that rendering them down into an mp4 will not take even longer and if Youtube will be able to interpret the footage as well as they do my mp4 containers. Will the mov video files somehow alter the mp4 container?

And how about editing with mov or mp4 in After Effects, another whole consideration for me...

I probably need to read a big thick book on this subject but if someone could give an overview opinion on these questions I have laid out I would greatly appreciate the help.

Thanks in advance.

RexRed