Yes, Onza 3 for 2012 is the same as 2011 except that the TRG/SOS have been replaced with a conventional rod/cable slide and a separate string stop. And two Nitro cam sizes are offered (1.5 and 2.0), thus a wider draw length range is now offered.
I purchased a 2011 model, it already had the TRG/SOS replaced with the above mentioned arrangements. Well, the string stop model was slightly different than in 2012 model. And the 2011 model has 60th anniversary badges in it, which I suppose have been replaced with different ones in 2012 model
Rytera Nemesis, 2012
Martin Onza 3, 2011
Hoyt CRX 32, 2011 (SOLD)
Martin Phantom II, 2003