Joined: Dec 2005
Posts: 2243
Oops! I thought one was a 2 amp and the other was a 2.1 amp. My bad. I would use the larger one on both. That's likely the one that came with the iPad I would think. It's just a max rating. The device will only "Draw" the amount of current to charge itself, but yes, the smaller one might take longer to charge the iPad.
Krunch