I personally own a Sat+ and to me, after seeing both now...The colors are better on the Sat+ IMO anyways. If you're going to be low light planted tank/lo-tech though, either would work. If you wanted plants that have more color and high light needs/co2 injection, I wouldn't recommend either of these alone. I would go with a different fixture, or buy two of them, or even mix match.
I'm assuming your tank is 22in deepish. With substrate I'm imagining 19in(ish). That's really deep for either of those fixtures to reach on their own.