https://en.wikipedia.org/wiki/Harris%E2%80%93Benedict_equation lists both, and seems to consider the Mifflin-St. Jeor version a revision that sort of uses the same name. The calculator I linked uses constants from Roza-Shizgal, which is technically neither of these. All of the sets of constants were produced by taking linear regressions on measured energy expenditure among different groups of people. I don’t have much in the way of opinions about which of these sets of constants is best; the differences between them are small compared to the difference between “2000 is what it says on the nutrition facts panel” vs actually-using-any-sort-of-formula, and compared to the error in the activity-factor constant and the measurement error in a non-Soylent diet.
https://en.wikipedia.org/wiki/Harris%E2%80%93Benedict_equation lists both, and seems to consider the Mifflin-St. Jeor version a revision that sort of uses the same name. The calculator I linked uses constants from Roza-Shizgal, which is technically neither of these. All of the sets of constants were produced by taking linear regressions on measured energy expenditure among different groups of people. I don’t have much in the way of opinions about which of these sets of constants is best; the differences between them are small compared to the difference between “2000 is what it says on the nutrition facts panel” vs actually-using-any-sort-of-formula, and compared to the error in the activity-factor constant and the measurement error in a non-Soylent diet.