Jerry,
There was a time when AHPC produced two different mast sections. Cat rigged and sloop rigged superwing sections. The Cat rigged section had a thinner wall.
Now you can only buy the sloop mast and it is used in both configurations.
Now we're talking about cat rigged and sloop rigged carbon masts.
I expect you would be able to replicate the AHPC mast in a combination of carbon and glass to meet the bend characteristics of the aluminium mast and use it in both configurations. The weights would be almost the same as a full carbon mast as you would just be replacing carbon with equal weights of glass to maintain similar wall thicknesses for manual ruggedness while tuning the bend characteristics with the carbon type and orientation.
I expect with the addition of glass the mast would be more durable as it would compensate for some of the downsides of physical properties of carbon.
The Aluminium mast will always cost less than the carbon mast because of the labour component in the cost of the carbon mast.
On another point re UV protection.
When carbon masts were first being made with wet layup they were subject to UV degradation.
The move to pre-preg construction provided two significant improvements.
1)They are now built using a resin with a stronger resin matrix. The stronger resin matrix allows the layup to stand up better to compressive loading which is a prime cause of mast failure.
2)The second improvement was UV resistance. A UV inhibitor is included in the re-preg resin.
Personally I would probably store my mast out of direct sunlight but this should not be such a big issue with the UV inhibitor in the resin.

This is just the way I see things.

Regards,
Phill