Thinking Out Loud - Let's Get It On

Ed Sheeran became lately a popular target of plagiarism complaints. To date he holds the world record for having been sued for 100 million dollars (and also 20 million dollars for another song). His hit song Thinking Out Loud is allegedly copying Marvin Gaye's 1973 hit song Let's Get It On. Plaintiff complaint with analysis is available here.

For now there are a couple of YT videos arguing (usually) why Sheeran's song is not a case of infringement. Summaririzng them: the backing tracks sound similar indeed, the chords are not identic but close enough, the tempo is also close enough, while melodies are different. The videos point out that chord progressions can't be copyrighted.

In my analysis I will go beyond this level, and examine the plaintiff points in detail.

The conclusion: this is not a case of infringement.
See similarity test results in the right menu.