Carbon Express is by far the better of the two arrows.

I shoot CX300's myself and they are the best I have used thus far. I will be trying their terminator selects here soon simply because I want a heavier arrow than the CX. I also really like the PSE carbon force extremes as well.

I have not tried the Axis arrows but I have tried other Easton/ Beman (same company) arrows and IMHO they are junk.

I also can not fathom how the axis shaft with the HIT insert thingy can be very strong at the tip. It seems to me that a shaft that has its insert glued inside the shaft from the tip back would be much stronger than a shaft that has no insert at the end of the shaft. A glued in insert should help to hold together the shaft on hard hits.