It's speculation, but I believe the regular Kemper profiling fills out a bunch of parameters in a very flexible amp sim and then EQ matches. Something of that sort.
That can be very fast. But the kind of machine learning tonex does requires a lot more horse power.
Then again, I wonder how the new profiling works, if it's really that different from before, assuming the above is correct. Considering how quick it is, I would imagine it's based on some similar underlying tech, but maybe a more developed version of it?
But again. Speculation to the max.