@Jean-Charles M.1 wrote:
Yes I am sure that both values are indeed express in MB. MB: " a unit of computer memory or data storage capacity equal to 1,048,576 (220) bytes"
@Jean-Charles M.1, Just for your info: Apple usually uses SI style units in its products, while Dropbox uses binary style units! So, keeping in mind your observations, don't be so sure - better check it; don't just assume something (what you do as seems). Follow the Hannah's advice to check it and make it sure.
Does your Get Info panel, posted before, confirm your supposion? 🙂 I assume you can check if the units there match what you said (elementary arithmetic). Do they?