a query regarding memory card,

i dont know the diff between these 2 cards below,

http://www.adorama.com/IDSSD16GE3.html

http://www.adorama.com/IDSDUIC1016.html

please explain me the difference. and for the price of 32gb 30mbps card i can get 16gb 45mbps card in sandisk. so which is preferable for my T2i?