Replying to Dalbello Lupos

Hopefully someone has experience with multiple lupo models. I'm currents looking to buy one of the following:
Lupo Factory
Lupo 130c
Lupo AX125c
Ignoring the wider last of the ax, can I really expect to feel a difference in the flex between the 130s and 125?

Also, will the flex of the factory be different compared to the 130c since one is out of carbon fiber and the other not? I can't really imagine these materials flexing the exact same even though they are both 130.

Finally, how much difference in internal volume is there really between the 98 last Factory and 130c and the 100 last ax125c? I do have a wider forefoot but the rest of my feet is relatively thin and boney so fear that if there's slightly too much volume everywhere (especially the heel) I'll just be sliding around?

Thanks in advance for any comments.
So far I've had Scarpa Freedom RS 130s incase someone has a comparison of hethe dalbellos to those.