Iphone 6 screen color and housing and chip

iv seen on youtube that iphone 6s has a samsung and another chip ..

Does iphone 6 has it too?

my iphone 6 has a darker screen than my returned bended iphone 6

also the housing looks like used.. And i mean my friends phone has more matte feeling and darker gold .. Mine is more Brighter wich makes it used..

Does anyone has this issue too? Or is it not a issue?