As mentioned elsewhere in this thread, the end result of the Ian knot is supposed to be identical to the standard shoelace knot, see https://www.fieggen.com/shoelace/ianknottech.htm.
There is also https://www.fieggen.com/shoelace/secureknot.htm.
There is a handy listing of which knots are actually different towards the bottom of this page: https://www.fieggen.com/shoelace/knotcomparison.htm#identica...
I find the Ian knot effective enough, but I think it comes undone more easily than a normal shoelace knot, I had to tie my shoes a lot back when I was outside for many hours of the day and night.