Caledonia Works matches Bossman Games when it comes to the quality of their locomotives, To go with the recent GWR Hawksworth passenger carriages I bought myself the matching GWR "King" class 4-6-0 to pull those premier Cornish Riviera expresses: Here is a video review: Was there ever a Queen class on Britannia's rails? No, but there were Princess Royal's, LMS' mighty 4-6-2 express locomotives: soon to come to TSC
It's only true (mostly) for the modelling and visuals. While they've improved significantly with the functionality in recent months, they're not even close to BMG. I think Victory Works is closer to BMG in that regard, although their texturing can be hit-and-miss.