Went to 91/Expresso tryouts last year. Here is what I remember.

Express - tryout was a disaster as they had the 2nd and 3rd graders mixed together and 100+ kids on the field. They ended up with one 2nd grade team. No cuts and actually sent out an email saying the team was short players. Added players over the winter, lost a few too. Ended up with 20+.

91 - pure 2nd grade tryout. very organized. probably 30 kids. took about 12 for the A team and 12 for the B team. Held a 2nd tryout in January where they filled out both rosters.

The only pure 2nd grade teams out there were express, legacy, 91 a/b. Can make the tournament match ups tough as you end up playing a lot of 3rd grade teams.