LayerVault just has one plan: $24/user/month with unlimited storage and projects. Pixelapse seems more flexible with a free plan (1GB storage) and pay plans starting from $19/month (20GB) up to $149/month (100GB).
Not sure how they comparefeature or quality wise but Pixellapse's pricing plans might be serious trouble for LayerVault.
There is a Quora question for this well, where more (helpful) comparison information might be posted in the future.