What are the differences between Pega 8.5.3 version and Pega 8.5.5 version ?
Pega 8.5.3 and 8.5.5 will not have any major difference in functionality.. Pega will be mainly providing open issues fix and security related changes in the patch installations.
Please refer below mentioned article to know about the issues resolved in 8.5.3 and 8.5.5.