I don't have one so can't say how that Comet would stack up against the Wouxun supplied antenna. I can say that Wouxun has made a change in the 'duck' antenna supplied with the new model 'UV6D' HT
, and it is an improvement over the older supplied antennas. That opinion is from experience, not just what I've heard. The new 'duck' on the 'UV6D' is something like 1/2" longer and is constructed differently. I've used both the old/new ones and while the difference in performance isn't huge, there definitely is some improvement.
I don't have any 'scientific' figures about the difference in performance, it's only from sitting on my front porch and seeing what I can 'hit'. The local repeater is about 6 miles from my house, and was marginal with the old 'duck'. With the new one, it's a solid deal. Same output power so that's not a factor (used a 'UV2' and then a 'UV6', and swapped the antennas).
The improved performance is relative, keep that in mind. Neither compare to a typical mobile antenna or base antenna, naturally. I was honestly surprised, didn't expect that sort of difference. If I can find a source for the new Wouxun 'duck' antenna, I do plan to change the older 'duck' out for the new one.
I'm making some changes in things here so 'playing' with the HTs is sort of on the back-burner for now. I do plan to see what the results of trying a few of the 'quick-n-dirty' tricks with 'duck' antennas are, don't hold your breath though.
And the 'disclaimer' (naturally), your milage may vary from mine...
(FWIW - I just heard from the 'candy store', the Wouxun antenna goes for $15.00. Not sure about shipping.)