I, too, use both the 4.5x7 and 10x14, but on my DFX. There are awesome coils. EXcelent depth, VDI's are correct. I would think if a person had the 4.5x7, white's 6x10, the stock 950 and the 10x14 they would have every situation imaginable covered.
I agree 100% with what Steeleheadfever wrote. He discribed these 2 coils to a tee. Yes the 10x14 is a little heavy. I found my 4.5x7 is for sure good on wheaties at 6 or so inches (good signal, and have not dug any deeper than that yet) and it will hit quarters at least 8 inches (have not found any deeper than that). I just did a planted garden test between the stock 950 and the 10x14 yesterday. The 10x14 kick the stock coils tail. (targets have been in the ground for just over 3 years.)