Which is better for long-distance touring?

The Shoei Neotec 3. Its AIM+ shell, wind-tunnel shaping and built-in sun visor suit long days better than the Nolan.

The Shoei. Its multi-fiber AIM+ shell and removable 3D liner hold up better than the Nolan's thermoplastic build over years of use.

Is the Shoei worth stepping up to?

Yes if you ride often. You get a stronger shell, rotational-impact testing, a sun visor and a better visor mechanism.

Does the Nolan fit riders the Shoei doesn't?

Yes. The Nolan runs XXS to 3XL; the Shoei stops at XS and XL, so odd sizes go to Nolan.

The Shoei. Its shaped shell and integrated spoiler cut wind noise better than the Nolan's plainer flip-up design.

Can I add a communicator to both?

Yes. The Shoei takes the Shoei Comlink and the Nolan takes N-Com units, both sold separately.

Shoei Neotec 3 Modular Helmet vs Nolan N100-6 Helmet

The Shoei Neotec 3 is the better-engineered modular helmet: AIM+ shell, a CNS-3C visor, a built-in sun visor, and a shell tested for rotational impact. The Nolan N100-6 is a flip-up with a wider size run, from XXS to 3XL, and a lower-tier build. Owners rate the Shoei well on fit, quiet and finish. The Nolan is the pick when you need an odd size or a spare flip-up.

Choose the Shoei Neotec 3 if you want a premium modular with a strong visor, sun shade and rotational-impact testing.
Choose the Nolan N100-6 if you need an unusual size or a second flip-up helmet for mixed riding.

Prices

Shoei Neotec 3 Modular Helmet: $630.30 at Motocard.com (last seen Nov 13)
Nolan N100-6 Helmet: $335.35 at Motoin (last seen Nov 13)
Difference: the Nolan N100-6 Helmet is $294.95 cheaper than the Shoei Neotec 3 Modular Helmet at the latest prices (Nov 13)