Canon EF 40mm f2.8 consistently sharp across the frame?

Does the EF 40mm f/2.8 lens give sharpness not just at the center but also to the periphery most of the time..? In comparison with the 50mm f/1.8 STM which only very sharp at the center..?

I have done some research on the web and found myself ambivalent whether or not I can answer the above question to myself. Some people say the 40mm is consistently sharp across the frame so it has better IQ than the 50mm.

But, I also found that Canon USA official YouTube channel replied on a comment and said that not much difference between those two lenses. The comment is on this video