Personally, I would only choose M-disc or Panasonic made discs in 2020. The Sony 128GB are also a runner up if large discs are needed and you plan on storing them as well as possible. Right now I am running an outdoor test with these:
TDK 25GB made in Japan (used in someone else’s test outdoors) for comparison
Panasonic 50GB Printable
M-disc 100GB Non-printable
Sony 128GB Printable from Japan
My advice after having compared the above discs, so far, is that the M-discs are built physically better then Sony or close to the same or better then the Panasonic. They even feel better. The Sony feels more fragile then the M-disc or Panasonic and doesn’t have all the coating features that M-disc or Panasonic has. The coating on M-disc and even the Panasonic is really good! Because of that they clean up from the outdoors very well. Others just don’t compare physically speaking. The insides I don’t know yet, except to say they are tougher and are lasting longer then I thought they would, including the TDK! My burner is the LG BH14NS40.