I think this is graptosedum 'ghosty'. I had my photos under the wrong plant too until I recently found out that these two plants often get confused, because they look almost identical. There are however, a few different ways to tell them apart. The easiest way to tell them apart is when they're blooming. Grapropetulum Paraguayense 'ghosty' has white flowers with red specks. Graptosedum 'ghosty' has yellow blooms. Hope this helps!