I suppose it could be but to me it looks like HIKING. The supposed difference is explained in the article:
Those that practice Shinrin-yoku explain that it differs from hiking or informative nature excursions because it centers on the therapeutic aspects of forest bathing. “So whereas a nature walk’s objective is to provide informational content and a hike’s is to reach a destination, a Shinrin-yoku walk’s objective is to give participants an opportunity to slow down, appreciate things that can only be seen or heard when one is moving slowly, and take a break from the stress of their daily lives,” Page said.
To me, however, hiking is not to "reach a destination". I do it for the exercise and for the "therapeutic aspects". So for me there is no difference.
OTOH, if it's Hiking Naked there might just be some difference ...
Like comparing Tai Chi to Karate, it’s slow motion exercise for lollygagging and flower sniffin’.