I have PC and usually book a midsize, then pick up whatever I can find in the PC section.

However, this time I noticed that both the "Compact SUV" (B4) and "Small SUV" (Q4) were SIGNIFICANTLY cheaper - like 50% less - than the midsize rate.

Do these qualify for Ultimate Choice? I assume Q4 (small SUV) probably does, but what about B4 (compact SUV)? I haven't been able to find an actual list of vehicle classes in order from lowest to highest, so I'm not sure what qualifies as "midsize or better"