Ummm please help me choose/decide

I have been accepted(direct entry) to study medicine at one of NZ's med schools as well as IMU.
I know that later in my studies I'll have to do residency/fellowship and from what I have heard England(a choice offered by IMU) is a much better place to do it than NZ.
If I graduate MBBS from England I think it would be easier to secure a place for residency. I'm not sure about my chances if I graduated from NZ. Also, graduating from England seem to provide me with more opportunities with my career and connections. Therefore, from this perspective, I think IMU is much desirable.
However, IMU doesn't guarantee that I'll be matched to a UK uni and the PMS I'm matched to might not be as good as the NZ med school I got accepted into. And NZ med schools might not be looked upon as that bad, so my chance in the UK for residency might also be there.
Also, I'm not sure if there will be discrimination when applying to residency/fellowship if they see that my pre-clinical years were done in Malaysia as opposed to in the UK.

Please help me by providing some information/opinion about this!~
Thank you!