Can I upgrade my NEO with the PRO2 components?

The NEO is not equipped to accommodate the larger diameter/greater forces required of the PRO2 Brew Head/its parts. 

However, you can upgrade your NEO with the Bottomless 2-in-1 Portafilter and Pressure Gauge Kit (essentially converting it to "brew like a Signature") to enjoy the same quality espresso the PRO2 produces, just with a smaller capacity/yield.