I'm not a professional but I cracked a tile on my kitchen counter and replaced it and you can't tell. Likely difference between you and me? My uncle is a tile m

I'm not a professional but I cracked a tile on my kitchen counter and replaced it and you can't tell. Likely difference between you and me? My uncle is a tile man and he walked me through the whole process (remotely), from finding a matching replacement tile and grout to what kind of tile glue works best for this kind of tile to grouting and cleaning.