I would highly recommend riding the two if you can. They are both in the same category and are made of carbon, but behave differently. I put several good rides on a Mojo, and was left with a much different impression than I expected going into it. The suspension was phenominal; efficent pedaling, great bump absorbtion, and it didn't dive. However, despite being 170lbs, I thought the frame was very flexy. Hard cornering, off camber tech, and awkward direction changes had the front and rear of the bike doing entirely different things under me. Granted, I come from a downhill background and ride relatively aggressive for my weight, but after the time I put on it I couldn't help but think what it would have been like if I was an average rider 20lbs heavier.

I didn't get much in the way of (valuable) input from the Ibis forum, no suprise there, so I doubt you'll see a post worded like this again in your researches. I was told the frame I rode was a fluke, but I like to think the construction of carbon is advanced enough to rule out such alarming deviations between frames. It's possible I suppose, but I had enough of a taste to rule out searching for another.
As for the BLTc, I'll leave the vast ammount of data in this forum for you to dig through. One thing is for sure though, you won't find the word flexy anywhere.