I am not sure what you are trying to achieve. But you can grab one installation, and install it two times on different folders names:
I recommend using official binaries because JuliaPro doesn’t always have the latest version of the packages (MKL for this case):
https://julialang.org/downloads/nightlies.html
The Users/yourName/.julia/packages is where packages are downloaded. This folder is shared between two different installations.
When you add MKL to one of those (GitHub - JuliaLinearAlgebra/MKL.jl: Intel MKL linear algebra backend for Julia), it downloads the package and then builds the files. So Julia-1.4-dev-MKL content is modified after installation.
You can install Atom:
Then uber-juno package for Atom:
You can change the Julia path for different installations doing this:
Go to Packages > Julia > Settings and change "Julia Path" to point to the Julia binary.
Alternatively, install Julia Pro and one Julia + MKL. Then point to the different path of Julia folders for two installations