Tim, I apologise for taking so long to respond. I read the story originally when I was helping to get the anthology ready, but I've been so busy since that I've only just come back to it.
I found the way you did the two parts very effective. We get one brother's view of the world, and while he's unhappy and at times bitter, I still sensed a strong defiance in him. The world was not there for him to fit in, but was there to fit to him! He was bisexual and he was happy with that, even though it caused pain.
Then we get the other brother's view of the world, and we see how different they were. This one has been more cautious, or, as he put it, less brave. But like the tortoise, his slow and steady approach to life has seen him last the distance. He's found a love and watched as his niece and nephew found lives and loves of their own. He brother's life was quick burning flame -- bright and illuminating, but short lived. His life has been a slow simmer, but with a soft warm glow that eventually shone through.
Okay... I'm blaming you, Tim. I don't normally get that poetic...

Congratulations!