mouse input and touch input giving different results

Hi guys.
So I am testing my game both on pc and android but i have come across an annoying problem.
my Input.GetMouseButton(0) and Input.GetTouch(0) bools all calculate my player speed by 150f * Time.deltaTime (on both halves of the screen) in my FixedUpdate method. The problem is, when using the touch input, the player speed is 5 times faster than when i use my mouseInput. what could be the problem?
Please help

    if(Input.GetMouseButton(0)){
Physics.Raycast(Camera.main.ScreenPointToRay(Input.mousePosition));
    var click = Camera.main.ScreenPointToRay(Input.mousePosition);
    Vector3 mousePos = Input.mousePosition;
     if(mousePos.x < Screen.width/2){
         transform.Rotate(0,0,rotateSpeed * Time.deltaTime);
     Debug.Log(" left ");
    }
    else if(mousePos.x > Screen.width/2){
         transform.Rotate(0,0,-rotateSpeed * Time.deltaTime);
         Debug.Log(" left ");
    }
    }
    if(Input.touchCount > 0){
        var touch = Input.GetTouch(0);
        if(touch.position.x < Screen.width/2){
            transform.Rotate(0,0,rotateSpeed * Time.deltaTime);
            Debug.Log("Left Click");
        }
        else if(touch.position.x > Screen.width/2){
            transform.Rotate(0,0,-rotateSpeed * Time.deltaTime);
            Debug.Log("Right Click");
        }
    }

Import in the CrossPlatformInput package into your project and you could actually continue to use Input.GetMouseButton(xxx).
myloweslife