LS Nepal Evo VS Cube: warmth...

I am looking for anyone with first hand experience with both boots (or the old Nepal Extremes) who could compare the warmth of the Evo/Extreme with the Cube, based on personal experience.  
There seems to be a lot of misinformation/marketing BS out there about the Nepal Cube.  I am trying to get direct input from people who've used them and other Nepal models in the field.  Seems to me the Cubes are not going to be as warm as the Extremes or Evos (due to their much lower volume and thinner sole)...  Thanks everyone. 

my climbing partner's sister's girlfiend's ski buddy said they were still pretty cold climbing in them.

I have them, I am cold even when climbing if it's lower than 15f. My girlfriend find hers too cold to use in the winter at all, she use hers during summer and shoulder season.

PS I mostly climb in the North East (Canada  and USA).

I spoke with some of the staff at IME in North Conway, NH and they said there was not a big difference between the Evo and the Cube. The Cubes may be slightly warmer, but not enough to warrant buying Cubes if you already have Evos.

Thanks for the replies so far.  My interest stems from the fact that I need to replace my 20+ year old Nepal Extremes.  I am curious about the cubes because they are so light, but I doubt they are as warm as the Evo's.

I had both for a short time and I never noticed much of a difference between them. They both felt very similar as far as the uppers went. The soles on the Cubes were much thinner, and it seemed like I would wear through the toe after a few seasons (that's probably a big chunk weight savings). LS claims their "carbon honeycomb whatever sole" is supposed to make the sole of the boot warmer. I don't remember ever feeling like the bottom of the boot was cold.

(Shameless plug: I have a pair in 47 for sale)

I've had both and found the Cubes to be less warm and less durable.

I’ve used my Nepal cubes in pretty cold weather and have come back without frostbite every time.  Last Saturday I did some multipitch with temps around -20 f for the duration of the day.  I didn’t plan on climbing I. The area we went to-otherwise would have brought different boots.  My feet weren’t happy-but they were warm enough that I never felt I needed to bail on the climbs.   The climbs involved about a 4 mile approach.  

I can’t imagine being cold in temps above 5 degrees personally (in the cubes).  Great boots. I have the newest version of the cubes plus the last generation and both hold up remarkably well.  

I’ve always heard Cubes are slightly less warm, but nothing significant.