First up is Black Out. This is probably as close to HG as I'll get. It darkens my lashes like no other mascara can. It's really important to me that a mascara is really pigmented because my lashes are already black. A lot of mascaras that don't pack enough pigment just end up looking grey. No bueno! Black Out also lengthens and volumizes my lashes very well and stays put all day. I get all the drama I need in one coat with the large, full brush. I love it!
Next is Iconic. Iconic is the perfect daytime mascara. It's slightly less pigmented than Black Out, but still darkens my lashes nicely. The brush separates and curls unbelievably! I have naturally curly lashes, but this just takes curly to a whole new level. Plus, the curl and definition last all day. Iconic leaves my lashes feeling soft and natural (even with multiple coats), which makes it the perfect mascara to layer a more dramatic mascara over for night looks.
Last is Extase. Extase is a bit of a problem child, but the extra effort is definitely worth it. This is the least pigmented (borderline charcoal), but I layer a darker mascara over it, so it's no biggie. The volume Extase gives my lashes is out of this world. It's such an instant effect that more than one coat is sort of overkill. I separate and darken my lashes with a coat of BE Buxom Lash, and my lashes are oomphed up and stay that way all day.
As for Diorshow and Unlimited, they were both duds for me. Black Out is Diorshow on crack (the good kind), and Unlimited is just...awful. Hopefully this helps a bit if you're as overwhelmed by all the different DiorShow mascaras as I was.