Giroux is definitely the "name" pick and in points only I don't think you could really even make a comparison between the two, but with the OP's particular cats I feel quite confident saying that Neal will prove to be the better option. Giroux is a stud no doubt, but Neal is a roto monster.
Dynasty - $100/yr buy-in - YR5 - $90M CAP
G A PTS +/- PIM PPP SOG W GAA SV% SO
C - Crosby, Giroux, Getzlaf
LW - Neal, Elias
RW - Perry, Voracek
D - Letang, Chara, Boyle, Del Zotto, Faulk
Util - Eberle, Seguin,Hossa, Pavelski
G - Rask, Lehtonen
Selanne, Iginla, Doan, M. Foligno, Bogosian, Garrison, McDonagh, Gardiner, Bryzgalov
Forsberg, Bjugstad, Eller, M. Backlund, Vatanen, R. Murphy, Lack.
2010-11 - 1st
2011-12 - 1st
2012-13 - 2nd