There are infinite possibilities here, some less probable than others.
Some are pretty much just like ours, with a trivial decision making the difference.
Heinkel #1: If I’d known my day would turn out like this, I would have just had that extra cornetto at breakfast.
Heinkel #2: I did have that extra cornetto at breakfast.
Others, unfortunately, are both close to our own and far more sinister.
Alt!Integra: Sehr gut. Vorwärts!