Frankly, I liked the 2003 version better, it made much more sense for Pluto seeing through Uran that life is not just fighting, destroying other robots and following orders mindlessly.
That was quite a touching scene in the 2003 series which Pluto retrieves Uran's flower colar and even put on her.

Though it was meant for Atom, it looked perfectly fine on her.
Also, I liked the idea of Pluto not wishing to harm Uran and not even trying.
It also felt pretty reasonable the fact that Pluto protected Uran when a debris was about to crush her:

Well, it was his responsability that debris was about to fall on her, since he destroyed Ham Egg's ships.
Also, the ending was fitting with Uran begging Pluto and Atom to stop fighting and Pluto admitted that he found somebody who he wanted to protect, so he grabbed Dark Pluto and jumped with him for his doom giving farewell to Uran.
It felt more of a honorable death for him, since he was still able to see Uran for the last time.
It also made sense that she don't tried to pose as a Atom in that series, since Uran don't like when people compare with him, not just because of the lack of abilities and having half of his powers, but also the fact she is a completely different person.
Anyway, would make sense for her posing as Atom and fight a enemy with such firepower?

That would not work, right? Also, we can take in account that Uran would be topless which could be troublesome due the censure nowadays.
But, since the series were much more modern, scan systems and photographic memories in robots could ruin any kind of failed desguice.
In the original 1963 series and 1980 series, we had Uran posing as Atom.
That idea doesn't make sense at all and is not just her size or the usage of a brief.
Uran hair have different cow lick points if compared to Atom and her nose is also different, plus a robot is not meant to be so forgetful.

Guess Tezuka forgot that robots are meant to have photographic memory.
It was also odd for Pluto mistooking Mont Blanc's true potential, although he was still a easy victim.
Pluto did fought back when Uran tried to face him, but he don't used his true power since she was not his target:


Uran was quite shameless in both 1963 and 1980 series, specially considering she didin't minded wearing a very short dress in the 1980 series which revealed her panties at each second. The 2003 Uran was more modest with a pretty modern attire and as well a very modest one piece swim wear.
He even got the consideration of releasing her, since she could be crushed in the battle with Brando in both 1963 and 1980 series since she would be still inside his body.
But anyway, it felt much tragic for Pluto dying without seeing Uran for the last time.
I recall of seeing a scene of the original mangá which Uran is visited by Pluto before he goes to fight Atom for the final time.
A similar scenario was used in the 2003 anime when Pluto decide to visit Uran to see how she was doing:
