For what it's worth here are my thoughts and experiences. I'm no operator. No military experience. I was in law enforcement for a bit but during that time certainly did not shoot anyone. I carry a red dot daily. (Trijicon RMR)
I have used Aimpoint as well as Eotech. I switched over to Aimpoint due to battery life and then of course you have heard of Eotech's issues with zero issues.
I also have the Trijicon MRO.
I prefer the Aimpoint T1 or T2.
With that being said, thats almost the cost of the scorpion. I started looking into less costly options.
It appears to me that the Romeo line is just a re-branded Holoson. So I started looking into Holosun and their features are pretty great. Their battery life is akin to Aimpoint.
I found some reviews of people who had torture tested their Holoson's and have surprisingly held up well.
I purchased one that was solar powered and adjustable. When it arrived one of the buttons lacked positive "click" feedback so I returned it and got another. For the price I'm happy with what I have (feature-wise).
Another interesting note:the most perfect circle I've ever owned was actually a $30 Truglo.
I have never used the Votex Sparc, the Leopold red dot or the Primary Arms.
I have (or have used) : Trijicon RMR MRO, Eotech 512 516 XPS, Aimpoint CompM4 Pro T1 T2, Shield RMS, Truglo generic red dot, Holosun HS403C