How to emphasize/mark one option over the other?

I'm attaching screenshot of the current section.

The left option, is the free option(obviously), while the right one, is the paid option, marked with "locked" emoji.

I'm trying to increase the "awareness" of the right(paid) button, and even create a more positive connotation to him, comparing the the "free option". Maybe, some how make them feel like the free option, is "cheaper"/"degraded quality", comparing to the paid one, which is far better?

What would you suggest, from your experience?

Edit :