two choices non-stop from Iceland to Seattle, Alaska and Icelandair

I'm quite tall so comparing Alaska first class vs. Icelandair premium saga. Neither are fully flat but it's a relatively short flight. Alaska is slightly cheaper (around $200) but Icelandair has lounge access in KEF. Icelandair has built-in screens but that is not a priority. What am I missing? Service? Thanks for your help.

Edit for more info: I do have an AK Visa, but miles are less of a priority for me than comfort. Both flights using the Max 8.