Could still be H retusa, individual darkness of green can vary from different growing conditions, plant to plant, slight leaf variability too. This is isn't always that exact a science, you're close enough to the ID to get any info, you need.

I don't know which Eches; care wise it's pretty much the same for Echs, so the specific ID is not so important.

Haworthias are NOT full sun plants; they like bright, indirect, like the edge of window. Nice that it bloomed for ya, but many folks take the bloom of as it's inconsequential & we really grow Haws for their foliage.

Succulents in particular do not do well w impatience or being fussing over. Seriously, they do best w/a fair amount of neglect.

I wouldn't be in such a hurry to switch their mix, that last pot looks to have plenty of perlite & will be fine as is. Personally, am I not a gritty mix user.

Sorry, I don't get the logic of this

"Also its in a somewhat gritty mix, because it hasn't fully rooted yet. So I'm waiting to put it in a truly gritty mix when he has some strong established roots."

Sounds like you'll be disrupting the plant twice instead of once, unnecessary & will present a setback to the plants. For every unpotting one disrupts the small young roots one is trying to grow in the first place.

My sense is your comment is illogical as it would be less disruptive to the plant to be repotted before fully established, not after. Or did I misunderstand?

I was mostly worried my Haw. Was etoliated, as it's leaves are far longer than pictures I've seen.

I like to label my plants to their species name if I can, as I often gift cuttings to friends and don't want to just give them a shoulder shrug when they ask "what kind is it". I'm OK with it just being a Echeveria for now, but I'd hope to get a species name ( as time progresses.

The smaller one has very hairlike roots, so I potted it in this mix to get it started. I meant in about a year and a half, I will repot it in a gritty mix. Once it has thick roots which can survive better in a repotting.

I think they are both graptoverias, 2 is A Grimm One and 3 is Titubans.

I'm very new to this but I have a plant that looks like #2 and it's an echeveria agavoides :)