The current forge implementation does not always generate the same image as WebUI.
WebUI:
1girl
Negative prompt: worst quality,
Steps: 20, Sampler: DPM++ 2M, Schedule type: Karras, CFG scale: 7, Seed: 1, Size: 512x512, Model hash: 61f21f5915, Model: abyssorangemix2NSFW_abyssorangemix2Nsfw, CHG: "{'RegS': 1, 'RegR': 1, 'MaxI': 50, 'NBasis': 0, 'Reuse': 1, 'Tol': -4, 'IteSS': 1, 'ASpeed': 0.4, 'AStrength': 0.5, 'AADim': 2, 'CMode': 'More ControlNet', 'StartStep': 0, 'StopStep': 1}", Downcast alphas_cumprod: True, Version: v1.9.4

Forge
1girl
Negative prompt: worst quality,
Steps: 20, Sampler: DPM++ 2M Karras, CFG scale: 7, Seed: 1, Size: 512x512, Model hash: 61f21f5915, Model: abyssorangemix2NSFW_abyssorangemix2Nsfw, CHG: "{'RegS': 1, 'RegR': 1, 'MaxI': 50, 'NBasis': 0, 'Reuse': 1, 'Tol': -4, 'IteSS': 1, 'ASpeed': 0.4, 'AStrength': 0.5, 'AADim': 2, 'CMode': 'More ControlNet', 'StartStep': 0, 'StopStep': 1}", Version: f0.0.17v1.8.0rc-latest-277-g0af28699