I’m pretty new. Our class had the option of either plane. 12 in training and 6 went to each type. It was our choice, done by age. An old rule of thumb was the larger fleet had the most variety. That rule seems to hold true here as well. Can’t really go wrong with either, but the 767 does have more variety. It’s a good company, great co-workers, and challenging global flying. MX is well above average too. It’s a Great place to be, you’ll enjoy it.