Kemper tone has too much bass imo, but other than that it sounds far better than the POD, which is fizzy and harsh. Not sure what to tell you. Make sure your input/output settings, including the Kemper's gate, are tweaked to your liking. Maybe you're just so used to POD Farm that you want everything to sound like it. And like other have said, you can always profile the POD patch.
Fwiw, most stuff in the rig exchange is not good for metal. Even a lot of metal-oriented profiles aren't very good. If you stick with Lasse's profiles and swap the cabs out if need be, you should be able to find something you like. My go-to tone is his modded JCM 800 with a darker-sounding Mesa cab from the OwnHammer IR library. Works for pretty much anything.