I am looking to book business class seats from YYZ to HAN. I found a manageable price on Korean metal, but can only find it on KAL website, not Delta.com. Will I get the same MQM Skymiles if I book through Korean Airlines? Are there any potential problems if I book on the KAL website? Will I be able to select my seats?

I also need to look into the cancellation policy. I get comfort booking on Delta knowing I can get e-credits, but the unknown pitfalls of KAL website makes me anxious.

The YYZ to ICN flight is on a 787. Those are the Apex suites, correct?