Id go with what is in better condition and from the sounds of it both are dirty and not maintained well and shadow has playfield wear which will make it difficult to sell or trade later on. More likely the shadow has some issues your not seeing and has sanctum wear also. Seems lots gets broken on ts . Wcs usually has saucer wear and some broken plastics. I wld take someone that knows what to look for on pins and go from there. Both are fun pins but for your first pin od probably go witth wcs