Informatica developer and analyst replaces the traditional informatica dataquality. Using developer you can profile your data, create score cards, address validation is carried out in the tool, names match,Analyst tool is more of a GUI based tool where business analysts can perform the same stuff that a developer can do from a developer tool. Not sure what exactly you are looking for but, There is nothing that these tools can replace powercente or vice versa. This is totally different and used for different purposes.
What you will learn
IDQ is primarily used for Data Qality implementations like MDM (Master Data Management) where you will have one Golden record at any given point of time. At first you analyze data using Analyst and then perform Data Quality rules. The primary advantage I felt using IDQ is to navigate data. i.e from source to target you can see how your data is being sliced and diced at each transformation.