Yeah, we have no safety info other than that all seats on the market pass the same testing, and whatever the manufacturers claim about additional safety benefits. Of course they ALL claim that their seat is the safest. ;-)
But there are definitely some seats that are difficult to use, or aren't a good value because they're outgrown quickly. In contrast, there are seats out there that are easier to use for the majority of people and long-lasting. And the safest thing is to correctly install your seat and correctly use it every time.
So with some more info we can steer you toward the right seat(s) for your situation!