I think the answer is basically NO.

I believe the main theory in V groove or U is that the more sharp edges you give the spark to jump to from the center electrode, the less chance you have of a miss fire in the combustion process. When outer electrode rounds off it's edges, it takes more energy to bridge the gap, so adding more edges means you technically have a better chance of the spark always bridging. If your coil is marginal or weak, these type of plugs can help.

I myself see little reason to use them being I've never had problems with the old styles. Run the plug the car is supposed to have spec'd from the manufacturer, don't worry about fancy new plugs, if the spark ignites the mixture, it's done it's work.

WH