My 2 cents on a small tank…..I have owned both and currently using a Mp10qd on a Lagoon 25. They both are great pumps and move a lot of water. Gyre is a bigger footprint in the tank and more of a pain to clean, but has wider edge to edge flow.
Mp10 is simple to clean and smaller footprint and if you buy another wet side, you can swap it out in seconds while the other sits in citric acid.
I love the various modes of the Mp10 software. A lot of people hate mobius, while I haven’t had any issues with it. I chose Mp10 because of small footprint, huge flow and easy maintenance.
either one will fill your bio cube with flow, but in my opinion, mp10 will blend in better with your tank while not sacrificing any flow. Bigger tank, I would tell you to go gyre.
hth’s