Join Date: Feb 2011
Location: Kansas City, Mo.
Device(s): HTC G1, HTC G2, LG G2x, Nokia N900, HTC Amaze, Nexus 4, Nexus 7
Carrier: T-Mobile USA
Thanked 461 Times in 394 Posts
Impossible to quantify differences in the terms you want to - way too many variables.
Simply put, given a choice between single and dual core phones you want to go dual core almost every time. The only exception might be if a dual core unit had minimal RAM (a good single core with lotsa RAM *could* outperform a dual core with less RAM) or insufficient storage space for your needs.
Registered Linux user #266531 Android since v1.0