They appear to be. There are, however, some 470 species. Most have a 5-petaled flower with twice as many stamens as petals. Very few have either 4 or 6 petals. Plants in this genus can be annual or perennial, and range from tiny ground covers to shrubs.

The first one could be a Sedum or a hybrid. Second succulent I’d guess with those chubby leaves it’s a Pachyphytum or hybrid.

Thanks very much for the input.