Certainly their outcome does change based on diet. You can compare corn fed, grass fed - corn finished, grass fed and finished, and wild game.

In all cases, there are nutrients and proteins that you cannot find in plant based alternatives. If you are vegetarian or stronger, you have to supplement with pills to get the things that are not in your diet. It is unclear whether lab-grown will lack nutrients found in natural meat, or if artificial supplementation is really equivalent.

Hence the desire to stay close to our evolutionary roots. Same idea as walking a lot and squatting to duce.