The 5" private Kellyco Labeled Excelerator Coil is a double D so the Left to Right Separation is better than the White's 5.3 Eclipse which is a concentric design.
Both loops have their advantages.
The White's 5.3 Eclipse Concentric
* Depth Advantage
* Quieter under power lines
* Will Tag Good Targets under bad ones better
Excelerator 5"
* Double D smooths the mineral more
* Smallest Footprint, an advantage in trashy areas
* Increased Sensitivity on small jewelry.
Also: My Choice however would be the White's 4x6 Shooter. If you want a 9" Window, with the MOST sensitive hit on targets, the Jimmy Sierra Hot Foot, a 2x9" and HOT on the Tip... you can also use the tip as a pin pointer in most plug.