Both the CQR/Plow and the Delta/Wing are a plow style anchor. The most significant difference between these anchors is the fact that the CQR has a hinged design whereas the Delta is a one piece design.

The CQR is one of the oldest styles, dating back to the 30s and to this day, it remains one of the most popular anchors among blue water cruisers. Despite this, it has relatively low holding power and it consistently struggles in independent tests. It’s also rare to find a CQR under 25 lbs lending itself to the saying “There’s no such thing as a small CQR”. Despite these shortcomings, the hinged design makes it more responsive to wind and tide changes as compared to other anchors.

The Delta is arguably the most popular anchor on boats today, and is the standard anchor of choice used by most boat manufacturers. It has a good holding power per pound (about 50% more than the Bruce).

Both the Delta and the CQR perform well in most bottoms, struggling the most in rock.

Pros: Performs well in most conditions. Fits most bow rollers.
Cons: Hinged design can make stowage awkward. "No such thing as a small CQR/Plow anchor".
Bottoms: Performs well in most bottoms; struggles in rock.