I am trying to book a flight from DEN to LHR on april 16 2022,. For the record im booking using chase points, business class. There appears to be two different flights. One is BA flight 218 on a 777 plane. The other is Iberia operated by BA on the A-350 (flight 7406). They both take off and land at the same time (1930 denver time, land 1130 London time). I think its the same flight but they list different equipment so Im not sure. I would rather fly business on the A350 (unless IM wrong on that?) as its newer, but I dont want to go through Iberia. Can any of the pros here help me sort this out?

thanks!