Stetho is a fantastic tool, but it’s also a really large tool and does require some small configuration on your part.
DebugPort is tiny and completely drop-in.
The database inspection stuff in DebugPort is pretty much the same as in Stetho, except done via the terminal instead of in a Chrome tab. Additionally with DebugPort you have the ability to create/drop databases at runtime.
Ultimately it’s up to you, I think they’re both great tools.. but I’m also biased towards my own creation :)