Yeah, it is a completely different direction with the Roland way of sounds and editing. Generally you won't find any specs on number of layers that are actually included in each module sound. And you won't find specs like how many Megabytes or Gigabytes the module's capacities are, or how many Kilobytes or Megabytes the individual sounds are. But generally the size of the samples is very small, and amount of actual layers also very small. Just because when the studio recordings were made of the instruments, they were sampled with 100s of hits does not mean there are 100s of layers in each internal module sound. Generally, at least in the past, that has not seemed to be the case ...... just a handfull of samples for an instrument has seemed to be the case.
One thing people have been waiting to see was if Roland would add the ability to import your own samples to a flagship module. They did add that to this one, but it is very limited. Not the kind of thing like 2Box where you can import VST samples with like 100 plus unique instrument velocity hits. The sampling is limited to just a couple layers per instrument,Number of Samples:
Maximum 500 (includes factory preloaded user samples)
Sound Length (total): 24 minutes in mono, 12 minutes in stereo
File formats that can be loaded: WAV (44.1 kHz, 16/24 bits)"
So this is really just for adding a couple layers of sound on top of the instruments.
I do notice an improvement in sound quality on this module though, which to me means they at least started out with some better samples. Listening to the cymbals and toms in particular I hear more clarity, and sustain. The former flagship Roland module contained over a 1000 sounds, so since including user samples the limit now will be 500 it does make me wonder if the internal sounds are a little better quality, or more layers than earlier modules.
I do have to eat my words about not getting one of these modules though ....... since I do build and sell Roland compatible conversion kits besides my 2Box conversions ..... I will be picking up the TD-50 Upgrade pack, so I can check out the TD-50 and the new snare and ride. Plus.... test and set parameters with my own conversions for the new module. Which will give me a chance to do some side by side listening/testing with my 2Box. Don't worry, I won't be abandoning the 2Box camp!

But I may need to unload one of my THREE 2Box modules to recoup some $$$ and make some room ..... LOL It seems the Upgrade TD-50 packs won't ship til January 2017, even with pre-order, so it will be a while.
Oh, and, as a side note, next year with Winter NAMM 2017 promising to produce at least one ... or ... some new eDrum modules I may be forced to repeat this for the Mimic, and possibly a new 2Box model??? That is if I am not bankrupt by then .... LOL ....

J