How so? I have both (also the NB20000, but I don’t EDC the latter), gave my wife the gen 1, she absolutely loves it. She’s a much heavier power bank user than I am (her iPhone X battery is on its last legs) and her previous Anker 20,000mAh power bank was a real boat anchor in her purse. The UI in the Gen 2 is improved, it has those natty yellow ports and slightly higher output.

Here’s a positive review, apparently by the person who maintains the spreadsheet:

https://www.reddit.com/r/Ultralight/comments/w8mx0p/nitecore_nb10000_gen_2_power_bank/

Conversely here is a negative review:

https://www.reddit.com/r/Ultralight/comments/w848tp/my_opinion_of_nitecore_power_banks_after_1200/

He complains of durability of the ports, and I can see that. I take good care of my gear and must be the only person on the planet who doesn’t have ripped Apple charge cables despite their inadequate strain relief, whereas my wife and daughter are much rougher on their gear, so that might be worth considering in Anker vs Nitecore.

I don’t hike in the great outdoors, which seems to be the core Ultralight demographic, but urban dwellers benefit from lighter gear too.

One other good 10,000mAh power bank is the Xiaomi Pro, with its solid aluminum rather than plastic case, but that also makes it heavier than the carbon fiber Nitecore, and it’s harder to find in the US:

https://www.mi.com/uk/product/xiaomi-22-5w-power-bank-10000/