Difference between Classe CAP 150 and CAP 151

Does any one know the difference between the Classe CAP 150 and CAP 151 integrated amplifiers? I know they are both 150w per side and the CAP150 replaced the CAP 100 (100w) and thats that!

The CAP 80 was launched (with LED and offered 100w) just like the CAP100 but newer.

I need to know difference between CAP-150 and CAP-151(dual coloured faceplate)with LED!

Appreciat any assistance

I dont know the difference between their guts but I have read that the 151 is supposed to sound better but as with this hobby mileage will vary and it can be a very subjective thing, let it be known.