Is upgrading from my La Sportiva Nepal Evo to the Nepal Cube worth it?

I've been using the Nepal Extreme and now Evo for years and they work very well for my narrow, low-volume foot. I mostly climb WI3-4 in UT and CO with the occasional alpine trip. I'm looking for personal feedback as to whether the Cube's are much warmer and climb any better than the Evos. I know the Cubes are lighter, possibly at the expense of long term durability?

Yes. The lighter aspect makes it very worthwhile. Be aware if ordering online that the sizing of the Cubes seems to be half a size larger than the prior two generations. If you are presently wearing a 44 you will likely want a 43.5 in the Cubes. 

ClimbingOn ^^^ can you do a quick comparison of climbing performance and warmth relative to the EVO's? And thanks for the sizing tip! I'm a 44 in the EVO. 

I think the $50 (or whatever it is now) price premium between the Evo and the Cube is probably worth it for small reduction in weight alone (4-5oz depending on size?) but I wouldn't upgrade from a good, serviceable pair of Evo to the Cube expecting a significant difference.

Bump to the G5 or similar integrated gaiter boot for next-level boot?

Nat Shultz wrote: ClimbingOn ^^^ can you do a quick comparison of climbing performance and warmth relative to the EVO's? And thanks for the sizing tip! I'm a 44 in the EVO. 

I haven't really noticed any change in warmth, but I haven't been paying attention to that either. I've used the EVOs down to -20 (not recommended) but haven't been out in the super cold in the Cubes yet. I do notice the difference in weight, which also makes approaches a little nicer.

I'm not sure it makes sense to upgrade for casual climbing. If you're hitting it hard in the alpine, really getting after it on ice and mixed, or have long approaches, and want one boot to do it all, the Cubes are a great choice. But, people were doing all that in the EVOs as well... It's really similar to considering upgrading from Camalots to Ultralight Camalots. Do you need them? No. Are they nicer? Yes.

I'd get the G5s instead

Imo the cubes dont seem to be as warm as the previous generation.   The 4-5 ounces is noticeable but not a huge deal.  And the cubes seem to discolor quicker than the evos-atleast for me.  My cubes discolored and faded rather quickly but than kind of stagnated and look like they probably will stay the same color for several more years.  

I really liked the evos and really like the cubes-I sold the evos for the cubes and feel it was a lateral move, not a move up.  

I bought the cubes as a size up for longer approaches and alpine routes.  The weight benefit of the cubes is a positive, but if your evos fit fine and you're not needing to cut every last ounce, I would stick with the evos.

Thanks for all of the advice thus far! My Evos are like new and fit me well so I'm leaning in the direction of just keeping em. Sounds like the Cubes don't climb any better or offer increased warm. That a reduction in weight (~4oz/boot) is the main factor.