The information on their website says ‘upgraded processing engine’. It’s easy to think this means ‘new hardware’ but I completely agree that’s not 100% the case - it could indeed be same hardware used in a new way.
On their website, it only mentions the upgraded engine in the same breath as the the faster boot time as opposed to mentioning it *in direct relation to* the new engine to the new profiling. This might or might not be significant - I’ve enjoyed my Mk1 but getting clear info out of them isn’t quite as easy as I’d like! It’s easy to read bad intent there but often it’s just them being bad at communicating rather than anything significant.
On the Kemper forum, one of the mods said there were ‘technical reasons’ why the new profiling won’t work on MK1. Because of these things, it’s reasonable to believe that there is a hardware difference as they are sticking with the ethos that the new profiling / extra fx slots won’t work on Mk1 and they don’t see this happening. If it is proven that there is no physical difference whatsoever, this wouldn’t be a good look. As mentioned, whatever they’ve done isn’t enough for me personally to upgrade but I’m hopeful they would not go this route and that there is a physical difference, albeit a pretty small one!