I have around 1000 hours up on a 332s hd 650 combo, the 332 is solid as a rock and totally dependable. I believe the 332 series were designed using the hd650 as a reference and the synergy is excellent.
As for the "2011 new" tag I think they just mean it is a recent build as opposed to a unit from old warehouse stock as I have not heard of any revisions to the 332 series.
Concerning Little Dot, I had a MkIII and the 332s at the same time and found the 332s to be superior in every way so the MkIII was sold.
Also I have had quality issues with Little Dot returning faulty amplifiers on two separate occasions so can no longer recommend their products.