Thrust limit Boeing 777
Hello. I've got a question about thrust limit on B777. Some airlines has an option, when the plane, which reached cruise altitude, remains the thrust limit in CLB, instead CRZ. I understand that it allows greater threshold available thrust than in CRZ mode, but it isn't so much. Maybe I don't understand some things. I can't understand in what cases the CLB mode better than CRZ mode on cruise altitude. Thank you!