Just wondering what shoes are best for baby to wear when they start walking?

When my niece was younger my mum mentioned that the softer shoes are better for when they start walking so they can get the grasp of walking without wearing chunky shoes.

But my SIL's daughter will be walking soon and she seems to think that the 'pre-walkers' (soft sole) are no good for when they start walking??

To me, it makes more sense to wear the soft sole so they can get the grasp of things then move on to the thick sole.. But what is right? It also makes sense that they need the support of the thick sole.

So, for when they start walking do they need 'pre-walkers' or 'walkers'? (seems pretty obvious doesn't it ).