Are Rattmotor just a rebranding of Huanyangs or just using the same case please?

Just looking at a replacement VFD and came across this
https://www.amazon.co.uk/RATTMMOTOR-.../dp/B08PV1GD4C

Similarties to Huanyang HY Range are obvious but there's defintely more exposed heatsinks - though this may be a newer Huanyang design than our old 223B


Quick aside, does anyone understand the main differerences between the HY and YL range please?