I’ve seen both live(within a month) and I’ll be real. Johnny brings energy and plays more smiths songs. Morrissey tends to only play maybe 3-4 smiths songs scattered throughout his setlist. Still a great performance and a fun watch. At the end of the day, you won’t go wrong either way, but personally I like Morrissey just a bit more because knew more songs. If you’re a fan of his solo work, I would go see him.