Hi Ashley,
I think it’s more down to your own preferences, as with all things in life. Forgetting Motability for a moment, you can choose to purchase a reasonable second hand car for your money, or you can use similar amounts to facilitate a much newer or nicer spec car via a PCP. With this latter method you get a nicer car but end up constantly paying a monthly fee, hardly anybody buys the car at the end, they just have a new one and carry on paying. That’s what that form of vehicle credit is for after all. Now bring Motability back in and put it up against PCP finance, and there are very few circumstances where choosing the private route will end up being the cheapest option, especially considering the whole package aspect of servicing, tyres, insurance, mileage allowance, etc. And all of that is assuming you have the correct credit scores to achieve decent private interest rates.
For me, the choice of cars, the lack of hassle around maintenance, and the overall cost of ownership, dictates that Motability is the way to go.