Div 2 teams have a better chance of victory in a T20/RL game especially if like,say, Northants they pick their strongest team whilst the likes of Warks, Lancs play a 'weakened' team ie giving up & coming players a chance. Additionally some County squads, Northants again for example, are better geared to 1 day cricket than others, say Middlesex who seem to prioritize 4 day cricket quite rightly given they are Div 1 champions.