Quadro comparision quadro 2000 vs quadro 4000

hey guys please help me with quadro i am very confuse to buy quadro 2000 or 4000 , but someone told me that if i buy 2 quadro 2000 in the place of 1 quadro 4000 it give me a supap perfomance , he means it give you more perfomance than quadro 4000[b][/b]
is it possible
bcose quadro 4000 is 256 cuda core and quadro 2000 is 192 , so if i use 2 quadro 2000 so my memory is 284 cuda core , more that quadro 4000
so is that possible ?