The difference between eating meat and eating vegetables is massive for the activation of the pineal gland that being said, only one who has been down both paths will be able to offer his or her perception on the topic with any kind of relativity.
I agree with Silver on this topic that it is of your mind that determines whether or not what you eat is "bad" or "good" spirituality and is a decision that is personal to each to make. What you eat does not make you "good" or "bad" as they are just varying in different degrees on the same pole, like hot and cold it varies from perception to perception. One person's cold will be different than another's by various degrees.
What I do know is this topic of what to eat spiritually will create division on this board. Think of it this way, it is one's own sovereign right to what one puts in their body whether you determine if it's good or bad is of no consequence to the person you are judging. Your judgment will be based on your perception of what is good or bad.
Be the love and reserve judgment for yourself and not others.