To my ears and hands the essential difference is this. The V4 is chunkier, a little heavier, the neck a little heftier and the output a little more robust.
They have similar strings and action and swapping between the two, the Squire is a less substantial and more nimble instrument, with a less powerful pick up.
However, none of these differences is hugely pronounced, and I am as happy playing one as I am the other.
If we are geographically compatible I'd be delighted to let you have a play with both.