They are both being stupid, there is _currently_ no need to fork or update BCH code except for bugfixes the same as BTC. They already have a niche that offers faster/larger blocks than BTC which is suitable for purchasing and wiring money around.
From everything I've read to date, both are going after almost trivialities, unlimited blocksizes, shapeshifting, wormholes, lightning connectivity etc. None of that matters right now (if ever) and even when implemented the usage case is minimal for any of those, but made worse because of the opportunities of errors/fraud/theft and only serves to make the network less secure.
If I could I'd vote no to both...