I purchased my Mk3.5 59 plate 2.0 Sport Tech in July and so far have just used Supermarket fuel. As the car has done 63k and I don’t know what type of petrol the two previous owners used is Shell V Power worth the extra money?
I have used a few tankfulls and did not notice any differance btween that and 95 Octane.
Here’s what a petrol tanker driver told me. Local running around, use anything. Long journeys use 98 / V power etc. So I do.
When I’m out for a drive, I can easily cover 150 miles of light urban -A roads - B roads - NSL - C roads and minimal use of M Ways. I fact I did precisely that today. The more technical the road, the more likely I am to want to drive on it. Now don’t ask me about mpgs but I do find V power/ 98 RON and higher, gives me extended range. I’ll often drive the same routes and I have found 95 gives me less range than V power etc. Make of that what you will but it works for me. In short, I pay more for the stuff and use less of it.
Have used Vpower in my Mk2 and have found that it does increase the range and seems to be “smoother” than the regular stuff. Did notice that on a run across the A66 I did get a calculated 46mpg, (Admittedly we were doing no more than 60 where permitted owing to weather).
When I had my 2007 Ford Focus ST I only used V power from new, and on the one time that I couldn’t get it I had to fill up with bog standard BP unleaded - the car from re-staring ran like a bag of spanners! it eventually settled down but felt lacking in power & response - the reason for this is that the ECU in the focus adjusted its settings to get the most out of the fuel - knock sensors and the like. after a few tank fulls of v power it was back to its usual self.
My 2006 2.0l MX5 has had shell std unleaded in from about 15k miles Nov 2010, I put the odd tank of v power in now and again over the years however since around January this year I’ve been filling it with v power - the '5 now has around 82k miles on the clock - the mpg has got better only slightly but still better, and the engine responds as I think it should. I for one am of the opinion that it is good practice to use the best fuel you can, other people swear by BP ultimate or Tesco 99 but for me it’s Shell V power as the nearest fuel station is Shell and it’s not that much more! Oh and I get points too 
So in answer to your question - YES