Instrumental rationality is a type of reasoning that helps us figure out what action we should take to reach our goals. Instrumental rationality means that we look at the evidence we have, think through all the possible options, and decide which one will lead to the best result.
Value rationality is also a type of reasoning, but it is more about reaching an idea of what we value and making decisions that align with those values. Value rationality helps us understand our own values, like what we think is important and what matters to us, and then make decisions that are consistent with those values.