Much better than the DFX is overall field performance.
The initial question was about operation in the motion Discriminate mode so my reply addressed that comparison.
Like you, however, I love the Mixed Mode Audio of the XLT and agree that when able to hunt in that mode there is a lot of great audio and depth performance. Most people, and I think you might agree with me here, don't seem to have the patience or understanding of the XLT to handle it and get the most out of both modes.
I agree that the XLT
IS the best of White's current top-of-the-line models and I will hate to see in discontinued (it's overdue), but I also have to say that the XL Pro, already gone, darn it, can usually match or better the XLT in depth and TID accuracy ... again, if one masters it.
As for cruising for clad quarters, that is what most typical coin hunters are doing .... "cruising" for the common-depth, easy-to-find lost change and with Tone ID turned 'On', the XLT has no match. Nobody has a model with the excellent audio tones of the XLT. However, they are only good to a certain depth of detection, like the Target ID, and most people errantly rely on visual TID to make a dig/no-dig decision.
I know what the XLT can do, I I would encourage anyone who wants to be serious about hunting to consider getting a clean and decent (New!) XLT before they are gone, and also try to locate a spiffy clean XL Pro.
Those two models offer a lot of potential, as well as versatility, but we all know there is no single "perfect" detector. From my own ample time afield, however, I fee there are some which come close. One such critter is the IDX Pro, especially when modified by Bill Crabtree and here's why.
Mind you, this is based upon the types of sites I prefer to hunt and the conditions I usually encounter. I am not a big-time park hunter. Instead, I have favored hunting ghost towns since May 4th, 1969 and quickly added military & pioneer encampments; homesteads; old resort/recreation sites from the mid-1800s to the Depression Era; mining, logging and railroad camps; renovation sites; and similar places when my #1 type of trash is iron nails and other smaller, iron-based trash. Also where I know I am likely to encounter brush, building rubble or other constraints that limit search coil movement.
In short, I prefer to use a model that allows slow-motion sweep and a quick response and recovery. At the same time they have to give me ample depth of detection and I can accomplish this with the modified Classic III SL but also prefer the same basic circuitry with the added ID circuity of the IDX Pro.
Most of my friends who have been avid fans of the XLT and took the time to master it have also added a Classic ID, Classic III SL or IDX Pro to their arsenal because they know one detector can't do it all. One of these, especially the IDX Pro, makes an excellent compliment to the XLT.
From my experience and from others, even when hunting sites when we were using a mixture of these models to check a located target, we've found that the majority of the time the modified IDX Pro, and even the Classic ID, will provide an accurate TID AT DEPTH than we get from the XLT. Am I saying inches and inches? Of course not, but overall, they do a little bit better.
I wasn't slapping the XLT in the face. I can't because it has it's strengths, but the question was about performance in the Disc. mode. There wasn't much else to go on such as environment, etc.
Happy Hunting, Dave, and rest assured I am an XLT Fan

, not a basher!
Monte