Can you share some screenshots for this version?I suggest FFVI. That was the first version of Final Fantasy I've played.
Of course I want to play on desktop because I have a large monitor, so it will be more attractive to play on desktop instead of a smartphone.It depends if you want to play with PS, desktop or android version. Since I only play FF on my smartphone, I will recommend you play FF 15 versions like a new empire.
I like playing with my smartphone and I still enjoy the game although not so many people like playing FF with a phone.
I doubt you will have enough time to play all of them. The thing choosing a version to play first will save our time and we can have more interesting if playing on best version.I don't know which of them you like, I love all of them I really can't choose which I will prefer, I will go with final fantasyV. You can start again from there.