Both are totally different category of watch. I guess it'll depwnds on what are ur frequent occasions to wear the watch.
Sub C is very versatile, sporty can, formal so-so. And very loud! Very recognizable in every occasion.
Reverso is really formal and discreetly oozes its own charm. Especially nice to pair with a suit with cufflinks. Not many ppl will recognize the watch, though. But i take it as a plus point whenever i juz want to keep my head low.
If u want to get the reverso, i suggest u get the duo face version eg Day&Night. U'll get another black dial on ur watch which in my opinion is a bit dress down kinda dial. Juz right whenever u want to finish ur day with a beer or two at the pub and a folded sleeves. The black dial can be paired with jeans as well.
Juz my two cents. But then u can oso buy and keep both Reverso and Sub C. U definitely won't lose any money if u keep it for few yrs!