NBS - comparison between v2 and v3

About Marengo, from BoardGameGeek:

The 2nd title in The Gamers´ Napoleonic Brigade Series, featuring 280 die-cut counters and a full-colour 22x34" map. One game turn represents 30 minutes of real time, and one hex represents 200 yards. This series highlights Command & Control on the battlefield. Nominee for the 1995 Charles S. Roberts awards for Best Pre-World War II Boardgame (Charles S. Roberts Awards). Napoleon Brigade Series (NBS) - scale = 200 yrd/hex (183 m/hex) - time = Day-time turn = 30 min, Night turn = 1 hr - strength = 1 SP (Infantry) : 150 men 1 SP (Cavalry) : 100 men 1 SP (Artillery) : 3 Guns