In an effort to learn... My own way...
AKA
Mess around and see what does what,

I decided to see what the differences were between the various PreProcessors and models in ControlNet (in regards to Soft Edge).

This is not a "Line in the sand guide"

All Images were done with the following settings:

Checkpoint: aamAnyLoraAnimeMixAnime_V1
Sampler: DPM++ 2M SDE Karras
Steps: 20
No Hires fix or Refiner.
Width: 600
Height: 600
CFG Scale: 7
Seed: 788229145
Positive Prompt:
<lora:Asuna-10:1>, Asuna, breastplate, brown hair,

white_background,

Negative Prompt:

nsfw,

Control Net:
Control Weight: 1

Starting Control Step: 0

Ending Control Step: 1

Control Mode: Balanced

RESOURCES USED:

Lora Link : https://civitai.com/models/57407/asuna-sao-sword-art-online-yuki-asuna

Checkpoint Link: https://civitai.com/models/84586/aam-anylora-anime-mix-anime-screencap-style-model

Control Picture:

Initial Output:

The difference here can be subtle to some, but they are definitely there.

Full size image: https://image.civitai.com/xG1nkqKTMzGDvpLrqFT7WA/725a1ba9-cc62-4609-a77a-abb4db3dbe0b/width=4096/Civ-Chart-Pictorial-mask.jpeg

Final Output:

The Differences are not so subtle in the final images.

Full Size Image: https://image.civitai.com/xG1nkqKTMzGDvpLrqFT7WA/b2277594-5d5a-44a9-823f-e5bc3f8635cc/width=4096/Civ-Chart-Pictorial.jpeg

Hope this helps some of you out there,

Personally I learn better by seeing than reading a lengthy tutorial.

"I didn't fail, I found out 2,000 ways how not to make a light bulb."