"Universal" means "applying to all cases, or the whole world". It implies that something is all-encompassing and has no exceptions. You can't have something more universal than something that already applies to everything.
However, you can use different words to express degrees of universality:
* More widespread: This suggests that something is more common or prevalent than something else.
* More comprehensive: This suggests that something covers more ground or includes more aspects than something else.
* More global: This suggests that something has a wider reach or influence than something else.