Translation doubt

[Rebirthia]

I was reading Boys & Girls translation, from wataru and masa, and they are very different. It makes me think... why there are so many differences? which translations do you prefer (I don't refer to this song but in general)

Wataru:

We began to shine. Someone can stop us, right?
We began to flap. Someone had the right to stop them, right?

It's on my lips.
It's in my dreams.
It's a story told by two.
You say you want to be happy.
You've already been so many times.
What do you want?
What's lacking?
Where will you turn?
Even if you ask,
I won't have the answer.

The moment you support me,
don't forget
the promises we exchanged
this summer.

We began to shine. If it's us we'll grasp tomorrow sometime, right?
We began to flap. If it's them then they'll find a shining tomorrow, right?

I was really expecting it.
I was really doubting it.
What was it? Who was it?
They say he's a good person.
He seems like a person I don't care about.

The morning glow is dazzling.
It pierces my eyes.
My breast hurts.
I was a little confused.

masa:

Who can stop us starting to shine?
Who had the right to stop them starting to flap?

I often speak
I often dream
We often talk together
"I want to be happy"
How many times? I don't know
What actually I want
What I'm actually not satisfied with
What I'm actually going toward
You ask me
But I have no answer

At the moment I push you on the back
Please don't forget
The promise for this summer
You made for sure...

We start to shine, and will catch the future some day
They start to flap, and will find the bright future

I'm really expecting
I'm really doubting
Anyone is the same, aren't they?
You say I'm "a good person"
But it sounds like "a person you don't care about"

The morning glow wes dazzling
And made my eyes sting
I felt a pain in my chest
And was perplexed a little

Who can stop us starting to shine?
Who had the right to stop them starting to flap?