there are 2:

(() - ())

this block is like this:
instead of:
I have checked and they output the same
many scratchblocks have non-insertable dropdowns when they should have insertable ones e.g.

<key [ v] pressed?>
point in direction ( v)

has a dropdown for some reason it should be:

point in direction ()

it still works without it
for all of this why?

These are remnants from when the forums still used blocks from 2.0. The dropdown hasn't been fully updated.