looks like the biggest difference is the UA poll includes boarding and prep schools (Hill, Deerfield, Avon and IMG) while Nike does not include them - Nike seems to have a more LI tilt with St A's #2 while not even making UA list, also WM and SYO on Nike list but not on UA.

LI is very well represented on both lists and while I do not think St A's is a top 10 team they certainly deserve to be on the list and CSH is way undervalued on both lists, they are the best public school on LI and will show it this year....again