Do ACS and RSC journals have identical credit in a tenure-track application?
Given reputable venues like these, you should expect a good department that you'd want to be a part of to pay attention to the substance of your work, rather than splitting hairs on whether they like one society better than the other.

Not all departments will do this, of course.  For example, I know of at least one department that discounts all journals except ones published by its favorite society.  Do you really want to be part of such a narrow institution, however?