There's a big difference in the NCode lineup. Here's a summary:
N1-N3: Granny sticks, stay away unless you're 70 or above
N4: NOT Venus' actual racket - its lighter and the string pattern is less dense.
N5: Similar to Triad 5
N6: Similar to H6
N6-1 95: HPS 6.1 with more power, a bit lighter
N6-1 Tour: PS Tour 90, a bit flexier
N6-1 Team: Like the 6-1 95, 18/20 string pattern
NPro: Head Radical knock-off
NPro Surge: Updated, lighter version of the HPS Surge
NPS 95: Like the Team, but lighter and less head-light (1pt h/l) - same swingweight. It's the closest thing to the ROK in the Ncode series (might need lead in the handle though). It's very whippy as well (59 flex).