Since LCM/Turbo is released for a while, it's time to learn if we can take advantage with it.
I've done some tests with Nvidia 4060Ti 16gb VRAM and 80gb RAM, and hereunder is my conclusion.
In case you're interesting in the details of test result, you can find them in attachments.
pdf file include below information.
zip file includes detail test parameters and test results.
Base on the test results, I'll keep using SD v1.5 and SD v1.5 + LCM for now, because image quality of SDXL turbo model is not good enough yet and SDXL spends too much time with my computer (4060Ti). Also, in my opinion, 4080 should offer enough image generation speed for SDXL.