Thanks for your responses!!

Both bikes that I am looking are 2012 models, they both have Shimano Acera shifters. Giant simply lists them as "Shimano Acera", Trek list them as "Shiman M360 Acera, 8-speed trigger". I have not been able to find out what/or if there are any differences between these (2) listings.

Thanks again for both your responses, they will be a great help in my decision making process,

Tom