So the long Annie and Clarabel are well known for being released with the steam along Thomas

This Thomas was individually released by Plarail without the metallic ,with a white running board and a prefitted back coupling and by Trackmaster(Tomy), with the only difference with the one above, being the markings and the traction tires being gray.
https://thomasmotorized.fandom.com/wiki/Steam_Thomas
It appeared in the:
"Water tower steam set" https://thomasmotorized.fandom.com/wiki/Water_Tower_Steam_Set and
"Steam along Thomas set" https://thomasmotorized.fandom.com/wiki/Steam_Along_Thomas_Set
The long Annie and Clarabel also appeared in the:
*"more talkative Thomas set"
https://thomasmotorized.fandom.com/wiki/More_Talkative_Thomas_Set
The long version of Clarabel is as log as the express coaches
Annie and Clarabel don't have the same faces

Here are some comparisons between the regular Annie and Clarabel and the long ones



In my opinion The reason why Clarabel is longer is that it would look strange if Clarabel wold be shorter than Annie.