I just tested the Xpointer vs. my trusty (kinda) black Garrett...the one I didn't lose. Let me explain... these Garretts are great for about two or three years of daily use, then they start to chirp whenever they're turned on....but they only do this malfunction intermittently...like every 4th time they're turned on...so I can use it in a comparison. When these Garretts started doing this I'd buy another and keep the old one for "friends" . So I had three of them..until I lost my third.

Anyway, both the Garrett and Xpointer have the same characteristics when tested on a LC. Both start ringing 1.5 to 2 inches away and get faster as you move closer. The Garrett does have a faster sound off when first hitting the target. Garrett chirps at 150 BPM and the Xpointer 110.
The Xpointer has adjustable sensitivity. I didn't try this and not certain why I'd need it. I guess I need sensitivity training.
BUT it also chirps if you leave it on for 3 minutes!!! This would be helpful when I leave the darn thing at a hole.