Belstar broccoli doing badly; best 3 are piracicaba; too hot in grow room for Belstar?

Dang, 3 of the Belstar are completely kaput, and most of the rest of the Belstar look bad too.  3 piracicabas are doing great -- TOO great, seeing as there's still a month before GA is open and they're getting too huge.

My theory is the grow room was too hot for the Belstar and then when I started hardening, they got shaded by the bigger broccoli.

Oh well!