Not similar at all, as miSTer is all about the openness, and the minimig-aga core is of course Open Hardware.
Vampire, while being fully proprietary and closed, implements CPU and Amiga chipset extensions that are not found in any original Amiga hardware. If these are utilized, the possibility of vendor lock-in arises, as there's no alternative implementations.
I do think what Apollo is doing with Vampire is doing is amazing as well. Lots of respect for them for what they've done, even if it's closed source. I fully understand people wanting to make a living off their hard work.
Not similar at all, as miSTer is all about the openness, and the minimig-aga core is of course Open Hardware.
Vampire, while being fully proprietary and closed, implements CPU and Amiga chipset extensions that are not found in any original Amiga hardware. If these are utilized, the possibility of vendor lock-in arises, as there's no alternative implementations.