The original 5t4.org flying drone desgin has several technical iterations and modifications.
Along the way, there are three different designs that could be considered as "superior" depending on purpose and ideal outcome.
Church Mouse
Grasshopper and/or Cricket
5t4.org has already ruled out grasshopper and cricket designs due to the lack of advanced targeting and positional capabilities from SAT phone range of over 10,000 miles away. However, still effective with various radio signals a short distances.
The Church Mouse design has proven to be extremely effective at various close and long range missions both before and after flight (paratrooper and PJ status) and reaching destination via radio signal.