Originally Posted by
eyebull
All .177s are dual power, it's only certain .22 versions (older ones I think?) that are single power only.
The older models have plain iron sights, which I prefer, the newer ones have truglow fibreoptic sights.
The other main difference is the black/silver star models - they have a grip with a palm shelf. Unfortunately you can't swap these out for 1911 grips like you can the others.
It all depends on your preferences as to what's the better model for you. AFAIK they are as well built as they ever have been.