My sister-in-law has the NT01-B so I can do a little comparison:
NT01AX has 10 hour playtime per charge while the NT01-B down to half at 5 hour.
NT01AX has better Qualcomm chip than NT01-B.
NT01AX comes in "black gold" (bronze) but NT01-B comes in either matte black or "silver black".
I believe NT01AX comes with the NT-CASE2 which is an upgraded case. Maybe the newer NT01-B also comes with it.
Of course, the NT01AX also costs a bit more, but are well worth it in my books.
I personally DO NOT recommend the NT100. Infact, I exchanged the NT100 for the NT01AX. NT100's fit is poor as the attachable wings fall off way too easily (I see it as a design flaw). Sound quality and connection is pretty bad as well. 4 hour use per charge is alos pretty meagre. One good thing about the NT100 though, is it's IPX7 rating instead of the IPX4 on the NT01AX/B.
I would say go for the NT01AX, or the NT01-B if you really don't have the budget.
Thank you so much for your input,
If I am going for NT01AX, the price will be around jabra elite active 65t
Then I will considering between this two, anyone have compared between this two?
Will be my daily driver for commuting to work and also running and gym!
Thank you thank you