Not a direct answer, sorry. I haven't tried the Neo10. Neo10 would be superior from 250-1000, then cross to the Neo8 til 4k, then the Neo3. Basically 2 octaves each. I would think the Neo10 is getting pretty beamy at 3500. The datasheet shows 90 degrees (-6dB) at 4kHz. It could work crossing to a waveguide tweeter though.
I have the Neo8 crossed at 1kHz which from my testing is ideal for this driver. It can run lower, down to around 400, but it isn't a great performer down there at any reasonable drive level. Have had good results around 700 with a steeper crossover. 1kHz allows a nice smooth Bessel with a 6" woofer. I'm using it all the way up from there in nearfield listening (1 meter). Crossing to a wide dispersion (non-waveguide) tweeter it shouldn't go above 4kHz.
So, if you are using a waveguide tweeter that can match the directivity (and ideally cross a bit lower than you've indicated), go for the Neo10, otherwise the Neo8 (non-PDR).