Introducing a plant to the outdoors is inviting the outdoors into your grow room. Indoor grows have the benefit of a sterile environment if setup correctly and maintained. Aimaim is an experienced grower and can handle a pest issue in stride. Do you really want to add another problem like potentially plant-killing bugs to your list of issues?
To answer the first question about why your plants are growing differently...Gardeners cannot consistently produce crops until most of the variables are removed from the garden. Even then, Mother Nature can throw a new problem at you. But if most the variables are under control, you can quickly diagnosis and fix it. I see lighting, nutrients, clone sourcing, room conditions, and grower experience as contributors to your inconsistent plant growth.
Exposing all the plants to exactly the same grow room conditions is how the gardener achieves plant consistency and large crops. You are not there yet, but with multiple harvests under your belt, upgrades to your equipment, and learning from your mistakes, you can be. Think of your grow room as a laboratory. Good luck and congrats on your first grow!