I think the confusion comes for me due to the shared surges. Two can use progression and two can use traveling two can use… The overlap is cool and I like the logic but I do lose track.
Brandon and team have an Official Knights Radiant Order personality quiz on their website, take it here: https://www.brandonsanderson.com/official-knights-radiant-order-quiz/
Use the poll to record your results and see how rare your order is :)