This verse contains a number of uncommon, rare, and unique words for Jesus to use.
The word translated as "equal" also means "fair" and it is used only by Jesus four times. It also means "fair." Notice that here, this idea is espoused by the antagonists of the parable. Clearly, this was not a central message of Jesus.
Two of the uncommon words are related to the bearing of burdens, something Jesus espoused for his followers, but not commonly. He condemns his opponents for purring heavy burdens on people, claiming that his burden is light.
Christ's Words in Matthew as a Guide to 40 Days of Prayer.