BigLove is a merge of different SDXL models. The newest Photo version of Big Love were additionally trained for more photorealism & new concepts.

More Photorealism:

You can highly improve the images generated with this model by using img2img, upscaling, detailing etc. The Lightning lora enhances the look and sharpness despite only 8 steps. Alternatively, the DMD2 lora produces a sharp, but more natural look with less contrast. Also check out the Cuteness lora, which nicely enhances DMD2 images.