Replying to Dalbello Krypton 130 TI ID vs. Dalbello Krypton AX TI

Hi all, I need some help answering questions on these boots.

- First what does "TI", "ID", and "AX" stand for.
- I've been reading that the 130s come with two tongues, are these tongues different stiffness/flex? I assume the tongues are different flexes because they're listed under "B" and "C" below. If this is true, why would anyone get the 120s (unless you have a wider foot)?
- For the 130s, it states that the flex is 130, however, for the 120s, it says "R&D" flex, what does that mean?

Not sure if I should go with the 120s or 130s, I'm 6'3 195lbs and a pretty aggressive skier. I'm at 30.0 mondopoint and 100mm width. Will go to boot fitter but want some more knowledge before I go. Thanks.



B - STIFF FLEX: Lupo PRO HD, Krypton 130 ID, Il Moro

P - HARD FLEX: Lupo 130

C - MEDIUM FLEX: Lupo Factory (Carbon), Lupo AX 120, Lupo AX HD, Krypton 130 ID, Krypton 110 ID, Krypton AX 120 ID, Krypton AX 110, Chakra 105 ID

M - SOFT FLEX: Lupo AX 90, Lupo AX 105 W

D - SOFT FLEX: Chakra AX 90