The Topshop lipstick is in the shade Tease and as you can see they are near enough the same. The only real difference is the finish, Saint Germain is an Amplified Cream Lipstick where as Tease is less creamy and more on the matte side. But other than that I think they are very similar.
So if you want to try out a baby pink by not sure if it’s for you you should try Tease from Topshop first and then make the splurge for Mac. Tease is half price at £8 where as Saint Germain would cost you £15.50.
And for the packaging, they both have really cute packaging so you can’t really go wrong. Of course the Mac one will last a little bit longer but I really do like both!