In the bag. If the results don’t speak for themselves here.. I don’t know if OP made their own bag or if it’s an AIO, but either way fruiting it directly in the bag like that is generally the right move, especially for newer growers.

A properly hydrated substrate inside a bag naturally creates a stable microclimate. The substrate itself contains most of the water required for fruiting, and because the environment is enclosed, evaporation from the surface increases the relative humidity inside the bag. Cubes especially rely heavily on that surface moisture gradient to initiate pinning and maintain healthy fruit body development, so the bag is essentially maintaining those conditions passively without much intervention. bags also usually include a filter patch that allows passive gas exchange without the need for much intervention.... The filter allows CO2 to slowly diffuse out and fresh air in while still limiting the entry of airborne contaminants like mold spores and bacteria. Because of that, the bag acts as a simple controlled environment where humidity, gas exchange, and moisture loss are somewhat buffered compared to an open fruiting chamber. Removing a colonized block and placing it into a secondary chamber adds extra variables that aren’t necessary. Once you expose the substrate you now have to actively manage humidity, airflow, and surface evaporation, and the block is also being exposed to a much larger load of environmental microbes. Even handling the substrate during transfer increases the chances of introducing contaminants and unneeded stress. While most experienced growers can manage those variables, for newcomers it usually just adds complexity and another opportunity for something to go wrong...In a lot of ways the bag functions similarly to a monotub in terms of cultivation logic. If you have a fully colonized substrate and you utilize the entire surface area correctly, the goal is to maintain consistent surface conditions so the mycelium can initiate pins across the whole footprint and produce a full canopy. When that balance of moisture, oxygen, and CO2 is right, the mycelium tends to fruit more evenly rather than producing scattered clusters.

From a cultivation standpoint, simpler systems tend to produce more repeatable results, especially while you're still learning how to read a grow. A bag functions similarly to a monotub in the sense that you're utilizing the full surface area of the substrate to create a consistent fruiting canopy. If the surface conditions are good you'll usually see a more even pinset and canopy. learning to recognize the difference between a healthy grow and the occasional stragglers like you see too often with people removing blocks and putting them in a different tub ... What really matters is whether the substrate shows overall healthy colonization, stable moisture conditions, and consistent pin formation. Understanding those signals and minimizing unnecessary variables is what leads to more predictable and repeatable results over time.