There are certain versions of maps that are better IMO. If the mc version of the map somehow either adds gameplay value or builds upon the classic map, it's better. The minecraft version of office should be especially played here since it was made by someone from within the community so it already has elevated value.
If we add office, whether on the future "Vanilla Lite" (ETA ?) or the current non-vanilla. I think the version Vader made should be on both.
Hell. Why can't we just add the minecraft version and classic version to non-vanilla? Would it really hurt that much to have two versions of the same map? If people play them both that just means the community likes to play those maps.