Apparently the difference with Obscura is you use different VPN providers for the additional hop. So you don't have to trust Obscura or any single VPN.

"How is Obscura different from my VPN’s multihop?

Multihop VPNs claim they’re more secure because they direct your traffic through multiple servers. But the same provider still controls all of the servers, which means they can correlate your identity with your traffic.

In Obscura, we only control the first hop and use blind third-party relays for the exit hop. The result is that we can never correlate your identity with your traffic as we don’t even see your traffic in the first place!"