I'm sure that both will do a very reliable two day shipping.
The issue is how long it takes them to get the order ready and shipped, something neither of them are all that good at.
It's not like they hide it. Ecost:
AT eCOST, WE STRIVE TO SHIP YOUR ORDER AS QUICKLY AS POSSIBLE. HOWEVER, BECAUSE OF INVENTORY, SHIPPING, AND MATTERS OUTSIDE OF OUR CONTROL, OUR STATEMENTS AS TO USUAL SHIPPING TIMES ARE NOT GUARANTEES OR PROMISES THAT A PRODUCT WILL SHIP ON A SPECIFIC DAY.
and newegg
Does the expedited shipping option (Next Day Air, 2nd Day Air, etc.) ensure my order will be shipped out the same day it is placed?
Not necessarily. All orders require 1-2 business days to process and ship, regardless of the shipping method. If your order is urgent, we offer two options: Rush Processing and Local Express...