Understanding Transceiver vs buffer
They could use either part (or any of a number of similar ones). The 74HCT541 would work equally well.

Often there are reasons that go beyond technical though.  For example:


Cost - one may be cheaper
Availability - the other part may have a long lead time or are already in stock.
Minimization of number of parts in design - it is often desirable to reduce the number of different part numbers in a design. Especially this may useful to reduce the setup in the pick and place machine.
Commonality of design - using the same parts as on other designs