Its kind of apples and oranges. The K-Line engines have TMCC and better sound with smoke. The Williams engines generally run smoothly except for their very early offerings. It may have suethe smoke unit and if it has any sound it will be terrible. You will want to disconnect the speaker if it has one or use an ERR sound board. K-Line Big Boys show up frequently. I believe Weaver has done them in brass as well. Slightly better detail and sound than Williams.