Well I also never reach the same sound with any profile. Eg the free Roadking Profiles of Guido Bungenstock that sounded outstanding in the profiling video sounded extremely different on my Kemper (bassy, muffled and spongy). So what is the trick?! I do not know. The same I experienced with the JTM Profiles. They sounded modest in my recordings and with such scooped sound I can never think of playing live and apart from being heard. So there must be some magic in the house. I think they sound better with my EMG81 compared to my Harry Häussel PUs that are amazing and my all-time favorites. Still married with a mid-boosting Studio-EQ in stomp X with a free Rectifier profile from TMS. I then also bought the TMS rectifier pack and was disappointed that I haven‘t even found the profile I love so much. So where did that come from ;0? Aliens…
Oh, so we do sth wrong or the tranferability of the profiles sucks. JMT profiles in his videos sounded incredibly good. I bought kemper paying a load of money to reach sounds like his, even with more tweaking that I would expect to. Otherwise it doesnt deserves its money.