My theory is that this is due to the Columbia machines having smaller diameter taper-tubes, with less "flare" as they get to the horn neck.
Aside from that, with fresh rubber in the soundbox, I think their over-all frequency response is comparable to a Victrola, or any other talking machine with a mica diaphragm.
Now, to compare apples to oranges to peaches, i have a very nice oak Silvertone upright, that is comparable in size and shape to a Victrola XI, and has decent quality Saal hardware, in good repair. This machine is noticeably softer than even my Grafonola Mignonette, let alone a Victrola XI... I think part of this may be due to probably air-leakage at the vertical swing-joint in the taper-tube...
I am a little more concerned about the alleged tracking issues with some Columbia machines that cause more rapid record wear than some other designs... I think this is more of an issue with machines whose taper-tube is mounted in the corner of the motorboard (such as my Columbia "Jewel"), as opposed to the ones with the taper-tube mounted at back-center ( as with a Victrola) .
Your results may vary...

