In ski construction, the wood core dictates much of how a ski flexes, rebounds, and absorbs vibrations. Ignoring other construction details (e.g., fiberglass/carbon fiber layup, base material, edge sizing and hardness, cap vs sidewall construction, ...), what are the pros and cons of various wood species inside our skis? From familiar core materials such as poplar, ash, and maple, to exotics such as balsa, paulownia, and even bamboo, why would we want a ski built with a particular wood? Further confusing matters, many ski cores are built by laminating together several species.
All else being equal, how would I choose between a maple & ash ski versus a paulownia & flax ski?