If you use a VPN that allows you to set your location to USA then yes, you will have access to Netflix USA content (as to whether it is better is of course a matter of opinion!). There is content on the USA site that is not available in the UK but the reverse is also true. Of course if you have a VPN that allows you to choose your location (most do) then you can set it to whichever you want and have the best of both worlds.