I use MacBook Pro 11.3 (mid 2014) with Haiku OS, there are no device specific drivers for that OS, and it behaves the same as OSX. It’s most likely the firmware which exports a generic HID which does the “mapping”.
The trackpad was improved in 2015, I think there might be less of a difference on a 2014 model.
i have the opposite experience. installed windows 10 on mbp 15 2014 and came back days later because of the trackpad being unusable(high expectations maybe)