both are weapons made to kill both achieve in the same way by shooting projectiles they are similar and it cant be arguedEither one can name something similar or not.
Even though a Colt M4 and AT4 both shoot projectiles, one would be hard pressed to call them similar.
But you are missing an important step in the process... Apple chose to make a sandwich, using those ingredients, in a calculated way. Something like we need to use sesame buns, and add a thin layer of mayonnaise between the bread and the chicken so the chicken doesn't make the bread soggy. And then add the salt and pepper to the chicken because this produced the best flavor. We'll then add lettuce on top of the chicken followed by the tomato because this will give the best looking sandwich... appealing to the eye". Samsung came along and said "That's a great sandwich, lets make one just like it!".
Just because you give two people the same exact ingredients and lock them in a kitchen, it doesn't mean the meal will come out the same.
in the US there are around 1246367 R&D employees. so lets say you lock that many people in the kitchen with the same ingredients you really think there would be anything coming out that wasnt atleast very very close to something else coming out?