On a related note, how often do aircraft configurations switch back? Or, to put it another way, how accurate is using the seatmap to determine configuration within two weeks of the day of flight?

My IAD-ICN flight next Friday swapped from a Kosmo Suites 2.0 to a 1.0 aircraft, using the Business Class seatmap as a guide. Deciding if I should look to jump ship to another route or stick with what I have.

Thanks!