I always select 'CLB' when the trust limit changes to 'CRZ' at top of climb. The EK 777's were modified to stay in CLB at TOC, so even thought there is no difference in N1 between CON & CLB, CLB just looks right to me. (CON is for engine failure situations in my silly mind).
That being said, most of the F/O's I fly with have not read the bulletin & have no idea why I select it. Most eventually ask. From their comments, it seems that most captains haven't read the bulletin as well.
Some, after reading the bulletin when I pull it out to show them, point out that it is not a requirement, only a recommendation. While that is correct, I would rather stack things in my favour. And having seen how many do not pay close attention to airspeed in the cruise, particularly at high altitude, I would have thought that they would be keen for the extra thrust margin available with the auto throttle engaged.