The rough texture dell looks similar to the dells we have on the sales floor, I have a decent picture of those. It's hard to take macro photographs with a phone, but here's what I have (uploading now will edit when done.)
In the above, notice the "S". This example was not fromt eh XT3, but one of the larger current notebooks. I can get the exact model number if you like.
Fujitsu (please ignore green tint caused by display being on):
^The above keyboard was used in all fujitsu's larger convertible tablets from about 2006 until they replaced it for the T901/731 and again for the T902/732. Models that include it are: (T4210, Tt4220, T5010, T900 and many of their notebooks)
HP 8760: (this keycap technology is used basically across HP's board, from the ultraportable revolve to the huge 8760)
MS Surface Pro:
The above keyboard is similar to the X220's in terms of keycap printing. The same keyboard is used on the T430 and W530; certainly the same technology on the previous models, X220, T420s& T420, W520
If you look closely at the fujitsu, you can see a little wear on this example, though I have seen examples that are completely shiny and have the printing still visible. Also notice that edges of letters are sometimes darker or lighter.
We also have a bunch of IBM POS registers (that still use SDL to PS2 cables!) The keyboards (I've had to repair a few) are rubberdome over steel backplate (like the silent M's). I'm almost positive the keycaps are lasered and can get a picture at work if you like.
Seeing the full resolution of these makes me think I can get more detail. I want to take some "glare" photos that show the surface roughness and any raised portion on the keycap really well.
I've seen a LOT of keyboards, and am excited to finally start learning more about them. I think the fujitsu's are especially nice. Larger keys are stabilized with both a dummy scissor and
wire stabilizers. My least favourite in terms of feel was from a consumer Toshiba.
edit: the Dell's we have are E6530's and E6330's. based on the name, I would imagine they are from the same year (current) as the E6430.