I'm sitting here bored (coming up on 1 year of medical leave) so I'll do a data dump on the schedules :

7&7 is the default schedule once training is finished and you're signed off. The Crew Choice schedules refer to how many days worked in a 4 month period. Current period is Jan-Apr (I think). They can "borrow" up to 2 days from one month to another in the same period.

There's a CC54 that pays less than 7&7. Capped at around 10% and goes senior.

CC60 pays same as 7&7, you work almost the same number of days. I think 7&7 works out to 15.2 days per month whereas CC60 will average 15 days, but can flex from 13-17. 2nd year F/O pay on these schedule is $65,720.

CC72 averages 18 days per month, again +- 2. 2nd year F/O pay is 23% higher at $80,178. This is the schedule you'll be on until IOE is complete.

CC76 averages 19 days per month and pays 30% more than 7&7. 2nd year F/O pay is $85,436. Same +- 2 day rule, so you could work 21 days in a month, but you'd have a 17 day month somewhere in there too.

On the 72 and 76 you can sign up for 8 day tours and get an extra 3% pay. Overtime, holiday pay, and other "soft money" usually runs around 10% but of course is not guaranteed.

Someone correct me if I'm wrong but the CC60 is a bit hard to get, however the CC72 and 76 are not. They are capped at a max percentage but it's very, very, rare for someone not to be awarded those schedules.