We have used both the Schuberth and the Nolan.
Schuberth, great helmet, lousy bluetooth. Short range (8 m.), short battery life (6-7 hrs) and extremely hard to turn on and off with the remotes. Only the remotes can turn on, off or adjust volume and are very difficult to use, especially in sunlight. Must be installed by dealer and are expensive.
Nolan, good helmet, good bluetooth. Range up to 30 m. and battery life of up to about 10 hrs. Buttons on side of helmet are easy to use even when wearing the helmet. Self install and moderate cost.
Both require recharging daily which can be difficult while on the road for extended times. We have built 12 v. chargers and can use the bike battery for recharging overnight and have a couple of small holders for AA batteries that can plug in to the charger cord for extended use when the internal battery dies.