I've been faced with that situation of loaning a rifle several times when taking young men on their first hunts. I always insisted they come to the range with me first, try 5 or 6, and find one that seems most suitable for them.
My 7mag Sendero got the nod on 2 occasions but one time a fella selected my Marlin 336 .30-30.
That's cool and a great way to see what the person likes. Kudos to you. I've loaned very close friends rifles when they were hunting with me and let them pick their poison much like you did with yours. Once a friend picked my favorite 338 win mag that I usually carried and another time a friend picked a favorite 300 WBY mag I had. Getting friends and newcomers involved in hunting is what it's all about.