I use a Toddy and wanted to know if there is a difference and what in cold brewing and placing it in the fridge for 20-24 Hours versus the counter at room temp (65-70 deg)?
Well if you put it into a fridge, all you are doing is slowing down the process. Cold brew is one of the hardest things to mess up if you ask me, so I would just brew it room temperature. If you extend a brew process in time - than you generally have a larger interval of time where the coffee will still taste great, but since it's already hours long I really wouldn't worry about it. All the shops i've ever worked at brew room temperature. Hope this helps!
I don't really think there is a big difference in terms of taste, but the brew process time will be slower in fridge mode.