coolant replacement/flush vs. coolant replacement on 2000 Toyota Echo

On this website's estimator there are two services listed: coolant replacement/flush and coolant replacement. What is the difference, and does one need to do a flush? Thank you-

by in San Diego, CA on April 10, 2012
Get Your Car Fixed at a RepairPal Certified Shop.
We certify shops based on expertise, quality work, and verified customer reviews
1 answer 1 comment
ANSWER by , April 10, 2012
COOLANT REPL IS JUST THAT A DRAIN AND FILL. FLUSHING IS DONE WITH A MACH AND WORKS ALOT BETTER IF YOUR COOLING SYSTEM IS IN BAD SHAPE
COMMENT by , April 10, 2012
Thanks once again, Global.