yes with the Audio Note turntables we have the reference, the half reference and then the tt3 (and then others with less motors below that). as i understand it the ref and half ref are licensed from voyd whilst the tt3 is AN's own creation (albeit heavily influenced by voyd). i have never heard a ref or half ref.
with the tt3 we then have 4 different levels of motor. i have a psu3. makes a huge difference. to a very big extent in the tt3 we are listening to the motor. i have heard the psu4. i found the difference is shocking (but i frequently seem to lack proportion).
i feel with the AN tt3 it has less atmosphere than the la platine. i guess the noise is higher (3 motors). the drive is excellent. the usability is excellent. you turn it on. it hits perfect speed. the end. when i measure wow and flutter the numbers are much worse on the tt3. one can hear this a bit i think in that the la platine is very "solid" (when on fixed footers more so) and massive (finely grained). the tt3 is more like a little boat on the big ocean. the 401 sounds like a big modern aircraft carrier (total stability). the platine inbetween but on fixed feet more 401 than tt3.
finally the tt3 doesn't allow different arms which is simplifying but a little limiting for some perhaps.