I just finished ODST on legendary today and Reach a few days before.
I've got to say ... ODST was a TAD harder. Why?
- Jackals with rifles/sniper
- Team mate AI is sooooo crap. Especially during vehicles sequences and im in the warthog. I had the AI 'female' with me in the car and they couldn't shoot for jack, I though it was similar to women drivers (im kidding to all the women out there). BUT Buck was even worse on the last stage.....