Hi AhmedMohamed,
For Juniper, IPS=IDP - Intrusion detection functionality, that allows you to catch network attacks and protect your servers from known (sometimes even unknown) application-layer vulnerabilities. Can be used to protect clients from server-initiated attacks as well.
UTM includes network Antivirus, Antispam, Web filtering and Content filtering features, this functionality is usually needed to protect users of your branch offices.
Regards,
Anand
[KUDOS PLEASE! If you think I earned it!
If this solution worked for you please flag my post as an "Accepted Solution" so others can benefit..]