For example,I suppose GF could answer some of those questions. But, at the end of the day, the visual appearance of the two is not the same. & GF doesn't change appearances.
Eden looks like a garden, definitely. How did it happen? Where did it come from ? Why has it to be based on garden? Who possessed who out of his/her mind to create Eden? I think White Wing was involved because Squall and his party used Eden to hurt Ultimecia (Black Wing).
Let's compare that to what Ultimecia has done; she possessed Rinoa's mind and created Griever GF.
Ultimecia hating SeeDs and gardens, and then there's a White Wing Eden GF thing. Coincidence?
Yes, what's your point? It's not like I'm expecting you to believe R=U. Futher Esthar doesn't even believe in R=U.The characters resemble polar opposites in the game, and I think it's a huge leap of faith to declare that the game-makers believed that Rinoa is Ultimecia, because if they had, they would have made it clearer to us.
I'm guessing you haven't read the R=U theory? Because there are things in the theory that are backed up by the game. Some of them may sound nonsense but they are really there, which means that we can't just ignore them, they exist for a reason.If you personally believe that Rinoa is Ultimecia, that's fantastic for you. But, it is similar to someone believing that Squall leaves Rinoa for Ellone/Edea/Laguna/anyone after the game ends. It is possible, there is no clear way to disprove it, but it is not backed up by anything in the game.
and by the way, it's not just the dialogues that prove something, but there are also other things like images, animations and music for more hints.
EDIT--
It's possible that Ultimecia was reincarnated by Rinoa.
The game doesn't tell us when Ultimecia's time is, so...



