Lets see similar stuff
Coco beach - chocolate brown. Not the same but similar
Gold - golden lemon
blue - (new) blue
Naval blue - Blue storm
e/s
silverring - anti-establishment = not very similar on skin but alike in pan
belle azure is freshwater
etc
the list goes on and on...but the fact is that none of them are EXACTLY the same. Although if money is tight and you had to pick one you could. The differences sometimes come down to vibrancy, like the new blue pigment is no where near as good as the old blue pigment. It takes 3 swipes of the new to achieve one swipe of the old.
A lot of the colors the payoff is different, and therefore sometimes its nice to have both...Especially when using them with a base, which can change the color altogether, or pairing it with another color which can do the same.
Its like using a black or dark base with blue brown...It doesnt turn red or orange, it actually appears blue/brown..without that base it looks red.
The best advice I can actually give about color matching is go to MAC and test them on your skin...
