How does a New York strip and a sirloin steak differ?

"A New York Strip is a sirloin, but is generally cut from the uppermost section [of the] loin] where the meat is most tender (aka does less work). This is called the strip loin part of the sirloin. read more

The strip steak is also known as striploin, shell steak, Delmonico, New York or Kansas City strip steak. Cut from the strip loin part of the sirloin, the strip steak consists of a muscle that does little work, and it is particularly tender. read more

The steak your refering to is the Sirloin strip. Also known as a New York strip or if bone-in a Kansas City strip. The Top sirloin or Top Butt sirloin is a bit closer to the rump and dose slightly more work then the tenderloin. read more