I have been using the Secure variant for the last 10 years. It's effective, in that time my shoelaces have become loose precisely zero times, even though the knot is otherwise easy to untie.

I started using the Berluti knot last year, and it has never failed me. It takes a bit longer to tie, but it has never failed me. It is also easy to get undone without making another knot out of itself.

The Secure variant seems to be a slightly easier/quicker knot. I might give it a try. :)