I just weighed both and the 4" Duravane weighs 9.1 gn and the 2" blazer weighs 5.5 gn. each,will make a difference in total arrow wt. depends on what your after. I like the 2" blazer, but have used 4" vanes with out any problems. I used to use feathers ( more forgiving)until I corrected my rest clearence problems, went to a drop away, now I can use all the above.