Those hydrogens are chemically equivalent and enantiotopic. For compounds to be enantiomers there has to be a chiral center. If deuterium is substituted for either one of the c-1 hydrogens then c-1 is now a chiral center. This makes those hydrogens enantiotopic. If compounds are enantiomers then yes they have the same chemical and physical properties (unless there are other chiral molecules around) except that they will rotate polarized light in opposite directions.
