[Too]

One of my favorite tricks is to use a visual difftool.

Copy good log into left panel. Copy bad log into right panel. Quickly show which lines are new, which are missing and which are out of order. Obviously ignore the timestamps ;)

[Noumenon72]

I do this all the time (PyCharm has an amazing diff tool hidden under Cmd-Shift-A, Show Diff). With the command from above that removes all the numeric characters it's going to be even easier to compare, no more timestamps!