Track is pretty much the same. Lionel's accessories in its slightly more expensive starter sets include a diecast tractor trailer, grade crossings and freight. Kline tends toward phone poles and railroad signs, with occasional billboards. The freight cars tend to be lighter and less detailed, but are worth keeping. There are options you can employ to add excitement, interest and realism to your railroad.
Extra track means a more complex and therefore more interesting layout.
The right use of switches along with extra track allows for multi-train operations, more varied train operation and even realistic freight and passenger activities. Tunnels remain one of the most popular scenery items for model railroads. Combined with trestles and bridges, a tunnel brings that extra spark of life to train running. Well, we're not sure of the psychology behind it, but we know that tunnels make train running that much more fun. Real railroads do not continuously loop the loop.