Very much so. Even between minor versions, if you want to have the same behavior (which can have practical difference), you want to ensure you use the same solc

Very much so. Even between minor versions, if you want to have the same behavior (which can have practical difference), you want to ensure you use the same solc version. Syntax and functionality has also been changing quite a bit between versions (at least until 0.7). Solidity is not yet 1.0.