Either is compatible with my partitioning strategy afaict. The only issue there might be is with Windows not being able to access Linux partitions, but I don't even know if you can access plain Ext4 partitions nowadays.afaik if I keep a dual boot I keep window's bootloader because it won't play nice otherwise. If I'm nuking windows from orbit, I want to make sure it's clean.
I think what you do nowadays is install Grub at the top of the hierarchy and make it chainload the Windows bootloader. I don't know if the Windows bootloader is able to boot Linux at all. (WUBI used to be a thing iirc)Edit: quick googling shows I may be wrong. What's up with bootloaders and dual boots?