The Ping G15 Irons and K15 Irons have not only the similarities, and differences.

Color Code's Choice of them may be written down in the blank of "order postcript" before clicking "submit" when you place the order. 12 color codes are all available.

Then they are have differences.

The K15 Irons is designed for golfers who benefit from a maximum forgiveness design. The titanium face and steel body of the K15 iron creates a higher moment of inertia for greater accuracy and consistent distance results across the club face.

The technology of the G15 Irons provides the high-launching, maximum forgiveness benefits that the majority of golfers rely on to bring consistency to their iron play. The stainless steel iron’s cavity design features a new Custom Tuning Port (CTP) which expands the perimeter weighting and increases the moment of inertia.

Through the comparison, you know their difference,which kind of clubs do you choose? Or both don't choose.Maybe you will like the cheap G20 Irons,I think.Wish you have a good day!