I like that NB# makes different shapes to give us all options. Unlike eS where every shoe has the same shape which doesn't work for me. I'll also second that the 425 is junk.
Same, options are good. The only drawback is you have to try them on in person; easy enough to hit a zooms (they always have tons of different models) then order core.
For my feet the 'square' toes are almost always a miss, way to narrow (westgate/Tiago) and shoes like the 255 or 306 are round and fit a bit better but not the same size, i.e., the 10.5 255s fit great, in the foy tey were too big and 10s aere too small).
I was surprised the 440s worked out but they are sort of ia round/square toe hybrid among NB#. Great shoe.
Let me introduce you to my friend Cons then- consistently confusing across all models. I sized down a full size for some CTAS, true to size for fastbreaks, up a half size for Louie's, then one stars down a half size depending on which model they were.
Louies fit me true to size. 10s (picked up my first pair recently)
One stars always fit me true to size now. 10s (the KA pro I had to size down, this was years ago tho, like 5+)
Checkpoint pros, true to size. 10s (but run narrow)
Only old chucks do I need to size down; haven't picked up fastbreaks because I don't trust their sizing and no one local ever has them. I should just zappos an ugly colorway (if you're not using zappos you're missing out on easy order and returns, great of NB# sizing)