Hey bro, I had this dilemma when I was choosing whether to go to Nottingham or Monash Uni.
At the end, I pick Monash over Nottingham due to campus location and scholarship. (Monash USED to have Merit Scholarship in the form of 50% and 100% tuition fees waiver)
Both universities are good, so either way, you will be fine.

Australian BEng and UK BEng is different in the sense that BEM does recognize UK BEng as it is a 3 years course.
You will not be able to obtain IR status with it, you will have to go for MEng.
Work wise, employers will still employ someone with a UK BEng.