Best way to play on CRT and Steam Deck with shared save?

[jonnyapps]

Bit of a weird one!

I have a setup whereby I run emulation on my CRT TV using Batocera and sync the saves to my Steam Deck (via SyncThing).

I'm wondering what the best way to play is, to hopefully utilise the screen formats of both.

I have NEVER played FFT before (I had to google answers to register to the forum!).

So, I'm wondering a few things:

What's the best way to play at 240p?
From reading, it sounds like I want the PSP version but ported to PSX, but otherwise completely vanilla. I'd like to be able to experience the game as someone would have on PSP but in the PSX aspect ratio so I get integer scaling. Is The Lion War a 'vanilla' port? I'm confused by some of the things mentioned in the list on its download page about 'new events' etc.

Can I play in 16:9 on Steam Deck and share saves?
A secondary question, but assuming the first question is doable, is there a way I could share saves to Steam Deck but have my Deck version of the ROM run in 16:9? Totally fine if not, 4:3 on CRT is my biggest wish, just thought I'd ask!

In summary: Can I play vanilla PSP FFT at 240p? If so, can I play a compatible version in 16:9 and share saves between the two?

Thanks very much in advance, and for the work done to mod these games.

(Oh god, I just noticed there's more questions to answer in order to post!)