I doubt you'll see much difference between 4.2.2 and 4.3 unless HTC have modified Sense. The only reason that 4.3 is an appeal on the Nexus 7 for me is that Google has altered memory management and it no longer lags - I've not seen this issue with the One.
Previous Phones: HTC Google G1, HTC Hero, Nexus One, Nexus S, HTC Desire HD, Samsung Galaxy SII, HTC Sensation, Galaxy Nexus, HTC One X, Nexus 4, HTC One, Nexus 5, Sony Xperia Z2, Nexus 5.
Previous Tablets: Motorola Xoom, Nexus 7.
Current: Nexus 5, Sony Tablet Z LTE.