IMHO:
The different fret sizes only have advantages if you are wanting to change your playing style.
For instance, a jumbo fret wire will inherently give you increased ease of playability; because your fingers aren't bottoming out on the fingerboard, you don't have to press as hard to fret a note or chord.
The downside is that you need to adjust your playing style especially if you are used to playing on smaller frets, you'll tend to be heavy handed at the outset so your notes will be sharp and out of tune. The action will also feel a bit higher because you're used to feeling the fingerboard as you play, but as you get used to the wire you will notice the ease and speed in which you play.
I'm sure sustain and attack come into it somewhere as well, as with narrow frets - there is more of a 'knife edge' surface, a more clearly defined node at the end of the string - so probably better sustain and more punchy attack would be obtained with narrow frets.