Exactly! And since both are using the same technology and measuring in exactly the same place (dorsal side of the wrist), it is really no surprise that they get the same results.
actually if you saw the consumer reports' video about the apple watch you'd see that the sensor was very accurate, even when compared to the polar heart rate sensor which is normally strapped to the chest and not the wrist. overall this optic technology is considered by most to be very accurate.
Considered by whom!? Having worked in metabolic testing product development and sales for over 23 years im interested because all the worldwide journals on heart rate will need updating and the doctors and professors re-educating!