How will you know you are buying 2013 ProV1x and not last year's product?
Is there any particular markings to differentiate between the two models?
The first thing that you will notice is the different packaging - the 2013 Pro V1 and Pro V1x both have new packaging compared to previous generation.
The next physical difference will be the AIM line on the side of the golf balls - the 2013 Pro V1 and Pro V1x feature a grey AIM line, as opposed to a solid black one in the previous generation.
Finally, the performance will be slightly different depending on how you deliver the club back to the ball - more information can be found at http://www.titleist.co.uk/pro-v1/
Hope this helps.
Many thanks for your prompt and accurate response. You see so many offers it is sometimes difficult to purchase the latest products.