Those uiaa ratings are there for a reason
An ice axes used for self belay and arrest should be able to do so consistently without breaking
This means you should pick any one out of a bin and have full confidence that it would withstand its rating
You need to do all of what is shown in this video repeatedly over and over again … And involving some speed as well as theres been plenty of incidents where folks slipped, had a delayed reaction and couldnt self arrest at velocity … An axe needs to survive this
http://m.youtube.com/watch?v=LM3xLshmNnk
Reputable climbing companies will do random testing of samples for quality control on any climbing gear
Now if you should choose a carbon fiber walking stick or ski poles for this purpose thats entirely up to you
However i would NOT suggest that its suitable for self arrest or self belay in an article
Thats like me buying a hemp rope at walmart thats rated for 500 lbs and saying its fine for top rope climbing on
Its not even though you might be able to get away with it
Heres a broken carbon fiber non uiaa "ice axe"

A B rated axe meant for walking, glacier travel and non technical use holds at its rating 200kg (2 KN) pick and shaft … Consistently
http://www.needlesports.com/images/AttachedDocs/Ice-Tools%20EN%2013089.PDF
Theres a reason why life dependant safety gear is rated and tested for quality control these days
The camp corsa weights 3 oz more but is a certified UIAA B rated axe made by a reputable climbing company
What folks use is their own choice (unless yr part of a team) … But its a good question to ask if carrying a 4.5 oz single use cabon fiber "ice tool" with unknown quality control procedures and is unrated, vs a 7.5 oz rated axe thats much cheaper and can be uses for more purposes … Is an example of "stupid light"
;)