A question for all you rogue librarians

Is there a way to tell if these are an older and newer edition of the same text, or whether the newer text has been changed from that of the older edition?

1. _The School of Peter Abelard: The Influence of Abelard's Thought in the Early Scholastic Period_
by D. E. Luscombe (Cambridge Studies in Medieval Life and Thought: New Series)
Publication date: October 2008
ISBN: 97805210888a24

http://www.amazon.com/The-School-Peter-Abelard-Scholastic/dp/0521088828/ref=wl_it_dp_o_pC_nS_nC?ie=UTF8&colid=1I7K4AKE6CO1B&coliid=I1JDHLUTEO5FN3

2. Same title, same author, same series, but different publication date and ISBN
Publication Date: July 1, 1969
ISBN-10: 0521073375 ISBN-13: 978-0521073370

http://www.amazon.com/The-School-Peter-Abelard-Scholastic/dp/0521073375/ref=wl_it_dp_o_pC_nS_nC?ie=UTF8&colid=1I7K4AKE6CO1B&coliid=I32G10YGABUAPK