That kinda sez it all for me. What do you hope to gain by knowing better than your friend, and what will it cost the friendship to go there?
Theology expertise, yes we have that at our house, but it doesn't go to work casually. GOOD answers are founded on relationship-- it might be an interesting and fruitful discussion as an after-dinner topic, but that would depend on a lot of atmospherics.
No- best ask the friend to 'splain his/her thoughts, receive them as one opinion, and continue to make up your own mind. Friends generally can agree to disagree?