I swing a Sovereign Elite and can totally relate. Seems on just about every beach hunt I've had at least 1 or more targets that had me digging 1/2 way to China, like those rare & elusive soda cans and kids fruity drink pouches, lol. And let's not forget those coins that tend to be about 15" - 18" deep. That said, I just returned from a few years hiatus and just picked up an X-Terra Elite. I didn't buy it to replace my Sovereign, but to augment for beach hunting and for coinshooting on land. I think Sovereign owners will understand, but I really don't know or care if the X-Terra Elite will detect "deeper" than my Sovereign. If it does. that's fine. But if it just equals the depth of my Sovereign, I'll be happy. I know that many guys/gals, especially if they're coming from an SF detector, will be looking for more depth. But IMO, I don't think Sovereign owners buy a new detector with high expectations of getting more depth. I think we tend to buy a new detector, at least in my case, because it may have features or other creature comforts that we don't have on the Sovereign, like VDI screen, waterproof, wireless headphones, lightweight, etc.
Personally, I bought the X-Terra Elite because it is a "self-contained" detector; lightweight, waterproof, Multi-IQ (since I'm coming from BBS/SMF), wireless headphones, has a screen with VDI, and is basically a grab & go type detector. I'm swinging my Sovereign Elite in my profile pic, detector in the Minelab pouch mounted to the top of my chest. It takes a lot more time to get set up and ready to hunt than the X-Terra Elite. With the X-Terra Elite, I can grab the detector, start swinging, and not be tethered to the detector due to having wireless headphones. So, for quick hunts, or a few hours day trip, or detecting in the rain or bad weather, I'll probably grab the X-Terra Elite, but I'll still use my Sovereign for longer beach hunts and/or hunting in good weather, with the X-Terra along as a backup, or vice versa. I love bad weather, so I'll hunt beaches in the rain and one time, I was out on the beach just after a hurricane passed by off the coast. That was surreal, I was the only person on the beach, and the entire area looked like a ghost town, lol. Also love hunting the wet and into the water a bit, so the X-Terra would be my choice for hunting in rain, hurricanes (after they pass by of course, lol), in water or hunting the wet, since it's waterproof.
I also think the X-Terra Elite might be a better choice for land hunts, nothing to do with depth, I'm just thinking it would be a better detector to use when coin shooting old houses, parks, etc., especially on permissions where I really want to get the best info possible on a target before deciding to dig. The last thing I want is to be digging so many holes on a permission, that the landowner thinks his property looks like a mine field, lol. Of course, on the beach, the sand is very forgiving, so I dig everything, only takes a minute or so to dig a target to find out what it is. Then, once the tide comes in, there's no trace that I was ever there.