I use some pigskin work gloves for everyday use, only break out the marmot mitts for the super cold/wet days.
IMO pigskin is better than regular leather because it somehow seems to stay drier, doesn't smell as bad, doesn't get dilapidated, and breaths a little better. I haven't even waterproofed them and they do great.
Something like this is gonna be pretty good.
Also the mitts you posted do have little finger separators which I personally can't stand. Just make sure you know