those are the 2 newest...and your odds are good your going to get one of those 2...but we do have some older trucks still in rotation before they are traded out like
Freightliner Columbias (Majority of the old fleet) some old Centuries (rare)
a smattering of Volvos (you probably wont get one there aren't that many in the fleet)
a few KW t660s (rarer than the volvo) and like 3 T600s
a couple Coronodos (not a chance you will get one much less see one...these guys have 3+ million miles)
I doubt they are in the fleet anymore...but we did have some International 9400i's but I think they are all gone now except for a few L/O's and O/O's