This looks to be the most recent game in which they’ve largely played on each other, and doesn’t look great for English (hitouts 46-14). English has improved a lot in the last 3 years, of course:
https://afltables.com/afl/stats/games/2020/072020200723.html
In general I would say that they score in different ways, but Witts seems hard for most to score against.
I didn’t seriously consider English for the captaincy, if that’s an indication. Merrett seems like he could go big though if he’s on.