I've learned from a pedia that both are almost the same. The thing is traditional weaning is progressive from puree to mashed to finger food to table food there is only delay in introducing finger and table food. It lets the baby get used to something then progress when he or she is ready. while on the other hand Blw its not progressive its a straight forward approach of weaning and both parties parent and baby should be ready for the journey. One may not be suitable for the another.
Magbasa pa