Ah, ok.
If you are doing it because you want a good looking bass then I would go for the Nitro if you can afford it.
Yes, it will look different as Nitro has it's own 'look'.
Personally, I would just let it age and in 10 years it will probably be worth a fortune
It is a personal thing. I don't like artifical worn basses. Ones that get there naturally are superb.
I would not refinish any of my basses as they are what they are.
I understand why you want to and therefore, go for it!
Nitro all the way