Enantimomers or same compound??

For other pairs...try like this...First find R/S configuration... for enatiomers(R|S or S|R ) for identical (R|R or S|S)

to find out relationship between molecule, you need to configure R/S configuration. if there is mirror image relationship between molecule then these are Enantiomers (R|S or RR|SS ...

If the bonds are exchanged by even number of times, then both will be identical and if they are exchanged by odd number of times, they are enantiomers. You try to do it by yourself...