I do like the appearance but I have to ask (speaking as an Englishman, where churches are a common sight), how are American churches laid out?
To attempt to answer your question, the Plasticville C-18 is a (very) loose interpretation of Episcopal and Catholic churches in the Philadelphia, PA area circa 1950-60. Bachmann, being located in Philadelphia, often took a great deal of its inspiration from structures found in the Philly suburbs, but greatly scaled down so as to permit their fitting on holiday toy train layouts and being usable with both Lionel and American Flyer. Bachmann was not alone in this. One can also observe in the Skyline kit structures of the 40's and early 50's broad hints of eastern Pennsylvania. Skyline was also located in Philadelphia along with some other small companies, which in their aggregate were known as the "Philadelphia Building Trust" in the hobby in those days.
Clearly, the new TrainWorx church model is a nostalgic harking back to the old C-18, which anyone who ever built a toy train layout at Christmas will instantly recognize. I take it as a broad compliment to the Bachmann of the Halcyon Days of the hobby and not as any violation of trade dress.
Probably more toy train trivia than you wanted to know.
Bob