BPC 7.5 to 10.1 HANA migration

Dear Experts,

Hope you all doing great. I need your expertise in BPC 10.1 HANA migration if any of you performed earlier.

1. Best practice would be using the DMO tool migration Vs Fresh install and export & import data using UJBR? Also, can you please share your experience on pros & cons on both.

2. Use same SID & hostname in HANA to avoid integration & BDLS insourcesystem?

3. Or use different SID & hostname?

Please suggest

Thanks

Yoga