Ooooh it doesn't look too different but I think it is a bit more visually appealing. This one makes me perceive more "depth" with the plants. I really like it! I like the addition of the smaller plants to the right too. Are those microswords?
If you make it a shrimp tank you can absolutely add an oto in. You just need to make sure there is enough food for both the shrimp oto since they eat the same thing. Otos like company so I suggest two (or one now and one later) but then you definitely have to make sure there is enough food. They're really the only safe fish for baby shrimp.