Schmeling definitely. Johnson does not appear to be. All of the Everlast pieces feature the Everlast label somewhere in there, either stripped in or plainly visible on the fighter's gloves or trunks. No logo, most likely not an Everlast piece. You can see it on Schmeling's glove where the logo has been inserted into the image. Here is an example where the image is not altered but the logos are visible:
Here is an advert from an Everlast annual [1930] offering photos for sale. Johnson is not listed. Ironically, the image in the ad doesn't have the logo or the name plate/ID, but every one of these I've been able to ID as an Everlast piece has had both elements.
I'd really like to see the others.