I had a K01 XD and replaced it with a N01XD SE. I traded the k01 so I didn’t have a direct A/B comparison. I got a good deal as the owner of the store used it a couple of months. I do think they did some tweaks to the analog side improving by tighting up the bass. I wish I could be more help but they are both so good I don’t want to spend your money giving an uneducated guess.
I will say I don’t regret the purchase!