Why are they bashing Stripe Connect, which is not comparable to Balanced? They were looking for Stripe Marketplace, which does offer a complete white-label solution.
For a fairer comparison and review of Stripe's white label marketplace API, I will shamelessly plug my blog:
http://blog.chriswinn.com/working-with-stripe-payouts
The people at Balanced are great, but I still prefer Stripe's products any day of the week. They've written the best API and documentation I've seen in a while, and laid a lot of groundwork for others to mimic. A good thing for us developers, at least.