You are probably thinking of Merion #18. I can remember playing it for the first time and being way short of the fairway on my Tee shot.
You will be using the same Tee's when you reach Tour Master, so that helps. If you are able to hit the ding very consistently then you might see a bit of difference for the 0.5 difference in precision. But I'm not sure.
Here is a link to a thread about Putter Precision tests now with Irons. I will give you some idea about how precision effects Iron shots:
195080.aspx?PageIndex=6
If you read it you will see why I'm not sure if you will notice a 0.5 difference in precision on the Drivers.
I looked at your scoring history and see you are playing a lot in the last 2 months. You will eventually want better irons, wedges and a putter. The Clevelands you use now are OK, but you will want much better ones like the top level Clevelands when they become available. Learn to make all the wedge shots, or at least pitch, flop and punches. It gives you much more shot versatility.
Biggest thing is to try and stay with one ball, if possible. Or at least balls with the same meter speed. I say this because I saw you had both the L33 Cally and the WGT Tour S balls loaded in your equipment. I used to use the Cally L33 as my Tournament ball, and the WGtTG13-S ball for fun. The meter speed was the same and I had mapped both balls for the clubs I was using at that time. So I knew about the relative distances for each.
Only thing I would add is that the L74 M1 driver might be of use from the legend tier. I hope this helps.
phred952