That assumes you're starting from the same place and head in the same direction. You have to know a library exists before you can use it. It has to be compatible with what you're using. There are many things out of your immediate control that can influence these things (imagine my next door neighbour only has an i3 and the fancy functions of the library which make it 100x faster require extensions of an i7. I immediately have an advantage. There are many subtler advantages that can come into play.)
That assumes you're starting from the same place and head in the same direction. You have to know a library exists before you can use it. It has to be compatible with what you're using. There are many things out of your immediate control that can influence these things (imagine my next door neighbour only has an i3 and the fancy functions of the library which make it 100x faster require extensions of an i7. I immediately have an advantage. There are many subtler advantages that can come into play.)