Are these mittens warmer or on the same warmth level of the Marmot Expedition Mitt?

Tech Specs:

Material:

[shell] Pertex Quantum; [palm] goatskin leather 

Insulation:

600-fill down, MTI synthetic 

Closure:

drawstring, elastic cuff, hook-and-loop closure 

Gauntlet:

yes 

Goggle Wipe:

no 

Nose Wipe:

no 

Weight:

10.2 oz 

Recommended Use:

mountaineering, alpine climbing 

Manufacturer Warranty:

lifetime