Hmm, to be honest, I find the first one better to scan. But that might be my personal preference, though 
It might also be the emphasis of the search query in the hits that make it a bit harder to scan, as they move the focus of your eyes to that, even though it’s not totally necessary – As far as I can tell, most launcher apps do not bold the search query, for example.
Nevertheless, scannability is basically a CSS issue. Maybe indenting the subtitles or reducing the subtitle font size even further would make a difference? Or even an option to only show the subtitle on selection/hover?