The name Leg of Mutton (or leg ‘o’ mutton) is the best indication as to what kind of sleeve the leg of mutton sleeve is. When fully drafted and sewn, it looks like you have a leg of mutton on your arm ...

A raglan top is a variation of the basic top pattern with the difference being that its sleeves extend to the collar/neckline in one piece and has a diagonal seam from the underarm to the collarbone.