Whenever I'm recording a vocalist for the first time I always like to shootout between these 2 mics as I know them inside out. The characteristics of each mic are completely different, the Rode is very bright and can be harsh in the high mids and highs. Whereas, the Blue is very warm and has great clarity in the lower mid region with the highs being scaled back slightly.
Every voice is different and finding the right mic/combination of mics is part of the fun! I use a wide range of mics on vocals including the Rode NT1-A, Blue Baby Bottle, Shure SM7b, Shure SM58 and more.