Vardon vs Interlocking? | Golf Monthly

swing path is surely more important and I can't see how which grip type overly affects that barring what Homer says with regards neutral (or strong/weak)

Aha , but there you go.
It is VERY difficult to picture, visualise or conceptualise what the different grips do for your swing.
One of the main reasona why Pros sert out your grips is to allow your body to have a chance of getting your swing on plane.

A typical "beginner" will pick up a golf clubs like a cricket bat, a baseball bat , a shovel (or any other cylindrical object that they are used to handling on a regular basis ). Most of those sorts of innitial grips will prevent them from feeling what a club does as it swings back, loads the shaft, and then releases close to impact.
As a result of not having a reasonably goo dgrip at the outset of playing the game, many golfers never ever feel what an unloading shaft or a full release is - other than the odd shot that goes like a rocket and leaves them standing there outstanded.

However, whilst for almost all golfers a solid repeatable grip that's in the fingers rather than the palm, will be the best way of gaining a repeatable swing with good contact/distance.
But it's not always that way.
A number of Pros will tell lady golfers to use a baseball grip (10 fingers on the club, no overlap or interlock).
There are some highly successful swings (e.g. Moe Norman's system with the club in your palm for example) that buck the trend.
The key is maximising the design features of the club/shaft loading/unloading without allowing your grip getting in teh way. Whichever grip, in combination with your swing, allows you to do so, is what you need.

I've got small hands and little fingers, so i overlap, but i occasionally revert to 10 finger/baseball