Difference between k20a engines

So I recently bought a k20a engine. I am aware it's not the CTR/ITR K20a. My new engine has a silver valve cover, orange dipstick and black intake manifold. From what I found out online, my engine is the base k20a. When I searched base k20a online, I got 2 results. One with a black intake manifold cover and one with a silver intake manifold cover. Can anyone tell me what the difference between the black intake manifold cover k20a and the silver intake manifold cover k20a is?