Originally Posted by jefftf1

Booking LAX-MEX and these two fares are confusing. Both get me in the front of the plane. Instant Upgrade is $100 less each way. Only difference I see on the fare chart is, surprisingly, that the Inst Up fare says 25-50% bonus, while Bus Spec is 25% bonus. So IU is cheaper and possibly gets more bonus miles than Bus Special.

Am I missing something here?