Here is my “sales” pitch for both models.
OVS – I like the compact carrying case, the swivel arm holding the camera. Nice unit. Not the best night vision capabilities.
Aqua – Best night vision on the market. Very small foot print, but need to buy accessories like a camera stand, cover, a little smaller screen than the OVS.
I was never that impressed with the direction the camera was pointing. I just set it up to look at my lures most of the time anyway. It’s a nice function, but I’m still not sold it’s worth the extra bucks.
In all honesty, I would consider the clarity of the water you most often fish, do you need this unit for night fishing(I’ve found very few lakes that have the clarity needed for good night use). Pick a model from each brand that fits your budget, set them side by side at your local sporting goods store. Buy the one that you feel is going to fit your style of fishing best. Both are great products and both companies stand behind their units.