SQL JOIN - WHERE clause vs. ON clause

Question

After reading it, this is not a duplicate of Explicit vs Implicit SQL Joins. The answer may be related (or even the same) but the question is diffe

Answer 1

I think it's the join sequence effect. In the upper left join case, SQL do Left join first and then do where filter. In the downer case, find Orders.ID=12345 first, and then do join.