OMG I love OOMPH! And just for your information all, OOMPH! Has been around since long before Rammstein. They along with KMFDM helped define the german industrial rock scene. They've been together for a long time. So please don't call them Rammstein 2.
If anything, Rammstein = OOMPH! 2 XD But I love both since I feel they have different styles.