The older fx2’s cables/hoses are not routed through the head tube (to its benefit as far as I’m concerned). I’d choose it over the newer fx2 personally. CUES and Altus are pretty on par quality-wise, and 1 vs 2 chainrings is a matter of personal preference. The simplicity of the 1x is nice for a casual rider I suppose, but not a huge difference.

The dual sport is like a more off road capable FX.

FX3 has a carbon fork (lighter), nicer 1x drivetrain, and better quality brakes.