eRecruitment software is basically recruitment software with an e in prefixed to the word recruitment. The e is the short-hand notation for ecommerce or electronic. It dates back the the late 1990s and early 2000s, when a business with a domain name starting with an e, became instantly more valuable than a business with a domain without the e.
Yes, it is the same but instead of just an e, there is also a hyphen prefixed to the word recruitment.
CRIS is an acronym for Cloud Recruitment Information System. CRIS is a recruitment software.