It's equally bad but in different ways. Neither is 'easier' in the long run but I suspect that it feels easier to the golden child when they are younger because they can do no wrong.
My brother was the golden child and I was the scapegoat.
We've both had therapy for the impact and it was damaging to both of us.
Summed up - I've never felt I was 'good enough' and he became very angry and confused with the world because it didn't recognise his 'specialness'. I could see that it had damaged him before he could. He just believed he was well within his rights to feel like he did because he was 'right'.
We went no contact with our mother in our 30s and had some very long and candid conversations about it all in our 30s and early 40s.
He admitted that he had grown up believing our parents' version of me, which was damaging because he had been very dismissive and critical of me since a young child which continued into our 30s and had also believed that life would come easily to him becaise he'd done all the 'right' things.
Eg when my husband had an affair and I ended the marriage, my brother blamed me for ruining the memories of his wedding (my husband had been his best man) and denying his daughter an uncle etc. It was all about him and how he felt and how it affected him because, growing up, that had been the only thing that mattered. It was 3 years before he asked me how I was. When he did, I pointed this out. He cried and apologised and that was the start of us repairing our relationship.
We're both approaching 50 now and our relationship is much better. We don't see each other very often, once or twice a year at most, but it's always nice when we do.
Our mother, in particular, pitted us against each other and tried to create sibling rivalry between us. Largely so she could tell people how she suffered because of us/how I had negatively impacted him too. We have also realised there was a degree of 'emotional incest' going on between my mother and him. She was a very unpleasant woman.
In reality we have been a huge support to each other as we've grown older and are immensely proud of each other's achievements/who we are and we have both raised lovely childen who get on well.
But it's been a long road and we have had to build it ourselves