simple: 350 sucks and 300 is good. 350 is made from a cheaper material and has a different design. it is easier to break and doesnt fly nearly as well and consistant as the 300 does.
thanks well ill go with your analysis; its pretty clear. and get some 300 by the way are they the best to play badminton with. Id play with medium speed
expensive doesnt always mean best Brett. but thats what yonex wants the market to believe. although this is a poor excuse to my previous comment on the shuttles, my own experience with many different types of them has gone to show that 300 is best.