Do seeds grow faster on the inside of a Red Barn Farm, or on the outside? I planted seeds on the inside and outside with about a 2-3 hour gap and both plots were ready to harvest at about the same time. Any ideas?
There is no difference in growth rates or times between the inside and the outside of any house.
The similarity you noticed is probably related to you visiting both gardens at the same time later on. Your visit after a set number of hours is what triggers the next stages of development: from seedling, to young, to mature, to elder.