Therefore, in MOV vs MP4 fight, MP4 will be the better choice when it comes to speed or spaces. Simply put, the smaller size means faster upload, download and stream speed. As in the confusion mentioned above and according to our practical experience, the create a MOV and MP4 files with the same compression settings, the output size can be times larger in MOV in comparison with MP4. To compare MP4 and MOV in file size, we will look at both the quality and compression degree. However, without considering other factors, MOV and MP4 are almost interchangeable in an Apple environment. In other words, if someone asks the mov mp4 difference in video quality, it's basically a file quality vs size issue. And since that MOV and MP4 container formats can use the same MPEG-4 formats and use the same lossy compression, the video quality remains pretty much the same. Qualityīoth MP4 and MOV are container formats, which means that in MOV or MP4 differences in quality is not determined by the extension themselves, but the codec in the format.