That's correct. The last two stones pictured are coticules. As Dave has said, the second to the last is a "bonded" coticule combo and the last pictured is a natural coticule combo. Since the coticule stone is a fairly soft stone, they're commonly found dished like that.
The De-fi barber hone looks to be a dual grit hone. Note the hairline spider web like cracks in the surface. Some barber hones seem to exhibit this type of damage more than others. Opinions may differ, but personally, when I find barber hones that exhibit those types of hairline cracks, I consider them not worth using or at the least, not worth selling to someone in good conscience. Yes, barber hones with light hairline cracks can work fine especially when used with lather which seems to temporarily "seal" the cracks, but I pass up barber hones that look like that in antique shops and I don't sell them to others. If the cracking is pervasive enough, flexing the hone can break them without too much force. I had one barber hone with spider web type cracking that essentially crumbled when I gave it a little flex.
Chris L