I have the Xeno EO3 & the JB-BC10 (which is the same size as the BA10, with a different emitter).
Whilst I like the Xeno, and it does put out a lot of light (especially with a li-ion), I prefer the BC10 and rarely carry the Xeno.
The BC10 feels like its built more solidly and after several concrete drops, works perfectly.
The UI of the BC10 is also simple and I always know which mode I'm in.
With the Xeno, I need to click thru a few times to try and work out which mode I'm using.
The button on the Xeno is a reverse clicky and a little harder to activate as its flush with the tail.
The BC10's tail is slightly tapered making the button easier to press, with the added avantage of a forward clicky that has momentary-on if you just press it lightly.
The BC10 also comes with a clip in case you want to quickly snap it onto a pocket.
The Xeno just rolls around in a pocket.
I've had the clip of the BC10 come off more than once though and have been lucky not to lose it.
Luckily, I've always had a backup light to search for the clip and BC10 when that's happened.
The beam of the Xeno is definitely more floody with a softer hotspot.
If I had to choose one over the other, for me at least, it would be the BC10.
Hope that's some help.
tgwnn