>Tornado baseball and Extra Innings seems to use the same Artwork.
While the stadium feature is duplicate, one noticeable difference is the stickers that are placed on the grass where the score stats are displayed via monitor and mirrored off the reflective mirror and illuminated on the backdrop baseball stadium piece.
See snap images of Tornado Baseball, Double Play, Extra Innings and notice how the stats (run/hits/error) are slightly different.
Years ago, Mr. Do had posted a good photo side-by-side comparison (Tornado Baseball and Extra Innings) showing the backdrop pieces and how it would appear in MAME whenever work is done on any of baseball backdrop pieces. That old post is long gone by now.