I'm starting a new project and I know that not all cards support DirectX 11, but the differences between DirectX 10 and 11 from a programming point of view are very different, so supporting both is likely not going to be possible for me. With that said, is it better to use DirectX 10 or 11 for this project? My target release date is about a year from now, so please take that into account as well. Thank you.

DirectX 11 but use feature level 10.0, that way all DX10 cards on Vista and higher can still run your project.

DirectX 11 but use feature level 10.0, that way all DX10 cards on Vista and higher can still run your project.

Great thank you so much