All in all, I think your plants look good, the different growth rates can also be normal.
Your plants look a bit overwatered, water them so that you need to give new water every 3 days, the pot should be quite light then. Your roots also need oxygen, so this ensures that.
Furthermore, it could be due to the nutrients, it's always a good idea to specify these in your profile, so other growers using the same can help out.