Hi,
No, it's not worth the extra. Any VESA compatible adjustable bracket will do, as long as it's rated for the size and weight of your TV. Whichever bracket you choose, do make sure you buy the correct anchors / fixings for your wall construction, make sure they're rated to take the weight of your TV and use plenty of them. The plugs and screws supplied with some brackets aren't suitable for all types of wall.