Sorry to have confused you.

The crank OD is the same but the ID of the shaft is different.
Timing is different as it is bigger
Therefore you might find the low end not your cup of tea.
But top end will be awesome with endless power.

Arrow can fit into a vzb. vzb is obselette now.
But Arrow have its own feature and performance.

The Arrow's low end can be compensated with low end initiate pipe.
Most here prefer the OS 2060 though.
A little softer in the low end but easy to drive thus making less mistakes.