Here's another 4-6-0 with a USRA short tender converted to oil... The tender includes a Tsunami 2 decoder and sugarcube speaker.
On the other hand, if you put that USRA Medium tender from the Bachmann 4-6-0 on the Bachmann 0-6-0 instead of its slope-back, you would have a prototypical model of a B&O D-30 switcher. The real railroads didn't seem to worry about what looks right when it came to assigning tenders to locomotives. The B&O also had some big 2-8-8-0s with shorty Vanderbilt tenders about the size of what model Power put on some of their 2-8-2 models.
The D-30s were USRA 0-6-0 originals, not copies; twenty from Baldwin and twenty from ALCo. Did B&O manage to get them delivered with the larger tenders? Was this a later swap? I can not remember ever seeing photograph of a B&O USRA 0-6-0 with the larger tender. I have seen some smaller tenders that may have been altered versions of the USRA short. I have seen some "wide vision" where the coal bunker was shrunk in width and built up on the sides. It looks much like the tender that came with the old Atlas/RR IHB 0-8-0. I have seen a few with no coal boards at all. All of these were smaller tenders, though. There is a photograph, taken in Ohio, of a Q-3 with a rather long Vanderbilt. It was added onto it after the locomotive to which it was attached was scrapped.
Grand Trunk Western 2600 series Consolidations dated back to the early 20th century. A number of them eventually received USRA tenders taken from either Mikados or Pacifics that received larger ones. http://eddiesrailroad.blogspot.com/2014/09/grand-trunk-western-railroad-2-8-0.html I especially appreciated that one as it will make my kitbash of the GTW engine from an MDC Harriman 2-8-0 much easier. Pere Marquette, on the other hand, actually ordered a series of 0-8-0's with very large tenders that were intended for a swap with one particular class of their Pacifics. The swap was done before the switchers ever entered service. Bottom line? Railroads did whatever suited their purpose.