After listening to many clips, I've narrowed down my choice to the two pedals for mild, warm overdrive. I know the Pork Loin is popular but for me it's way too ugly
My impression is:
The OCD sounds fat and warm. But it sounds like it cuts some low end.
The Sparkle Drive doesn't sound as fat as the OCD. But it can mix the clean signal, thus preserving the low end.
I welcome any opinions about the Voodoo Lab Sparkle Drive vs. Fulltone OCD.