Is better 1 bigger product or 2 products?

Hi everyone,
I have an item in CodeCanyon, is a mobile app for a directory WordPress theme.
We are developing the support for a new wp theme but I’m confused if including it in the already existing item (that already has reviews and sales) or to add a new one.

I would like to know the pros and cons.

What I think is that including in an already known product, the new integration can leverage sales to make itself known more, but I don’t know if users now know my app for that theme and wouldn’t want the support of the new theme to take a back seat.

On the other hand, having 2 items can cover more “researches” on CodeCanyon.

To evaluate the choose, you should know that the app will be similar for both themes, same technology , and the code can be not split in 2.

Thank you