I am pretty sure I know the answer, but want some clarity on it...Does upgrading every researcher's speed within an industry work the same as upgrading rare production output researcher? For example, looking at land production. At the moment, it would cost me 42k to upgrade all researchers within the industry and that would double my speed. However, it would cost me 50k to upgrade Jason Van Driessen (rare researcher) and he would give me x2 production output on all land production. Am I getting a better value on the speed upgrade?