Ping G15 or the new G20?? Who prefers which??

Going to get myself a new driver over the winter. I currently have a G10 , well did until i gave my Dad a shot of it and now he's claimed it. So something new for me I feel. Being a Ping man at heart I will probably stick with one of the G15 or G20 models.Does anyone feel there's much difference between the two?? I know it will boil down to how I perform with either club but just like to hear other people's views on either of them

Planned obsolecence!

Manufacturers bring something new out each year, and then tell you its better than last year's model coz.... If it only all the hype was true  we'd all be hitting it a thousand yards and splitting the flag.

Buy last year's model at half the price, it will serve you just as well.

I bought a G10, broke it then bought a G15. I can't tell the difference. Its just brilliant. Anyway, the G20. slightly longer front to back with a bit more weight in the heel to make it easier to get the ball up, allegedly. Oh, and it costs a lot more. I haven't seen the Ping boys on tour shooting any different with this years model than they did with last years.