Kask Utopia vs 100% Aircraft 2

No sources that do their own in-depth testing have considered the Kask Utopia to be a good enough purchase for it to earn a sport in their Bike Helmet roundups, which is typically a bad sign.

Moving on to the 100% Aircraft 2: no sources that perform reliable and objective hands-on testing have included it in their Bike Helmet roundups, which usually means that a product doesn't make for a good purchase.

As a last step, we wanted to do a head-to-head Kask Utopia vs. 100% Aircraft 2 comparison of their review performance but, unfortunately, weren't able to find any review ratings on either product.