How to request from a SOAP webservice, convert the SOAP response to XML and compare it to another SOAP response, in JAVA

i am completely new in doing this 3 steps, so can you please help me step by step. (I understand Java language, did couple of scripts here and there but never touched SOAP stuff). I need to to this: 1) Request from two SOAP services and store the responses in two objects. 2) Transform the response in XML. 3) Compare those two responses and see where is the difference at node/tag and maybe inside tag level (maybe using XMLUnit) 4) Report the differences, in console.(not as an error in JUnit). Thanks!