I’ve done both of them in the recent months and I found Albury to be busier than the Warrnambool line was. Warrnambool seemed packed, but really it was only the first car. I ended up moving seats because the other 3 or 4 cars were almost empty, it was only really the former first class car everyone really wanted to sit in. Albury I actually struggled to get a ticket on for a while and ended up sitting in a full of a seats with people on all sides of me (not necessarily an issue, just not something I had happen on the Warrnambool line in either direction)