Older thread, so you may have already found your answer or ordered the gloves. I recently received both. Limited use as they’ve been out in the cold, but no extensive experience as of yet with them. Northstar are quite warm, but for where I hunt, they won’t be a glassing glove for late season. More of a late season active glove or a glassing glove when the weather hasn’t turned for the worst.
Kenai packable glove will be more of an early season glassing mitt or to supplement thin gloves in that early/mid season.
Unless you have very mild falls, then it won’t cut it as a glassing glove for late season.
I use down mitts for glassing in late season. Hand warmers can be tossed inside for when the weathers dropping around that -20 and colder weather.