The Trijicon glass is really good, but then you're very quickly getting into the weight and cost of the VX6.
The glass on the VXR 1.25-4 seems better than the FX2 1-4. But I haven't compared them side by side.
You can control the brightness of the Firedot, which you can't do on the Trijicon without weird zipper sock things or tape.
