Other chains like bitcoin still verify that their checkpoint has the most cumulative work behind it, so you have additional assurance that the miners are also attesting to the checkpoint correctness. In Monero you have to trust the checkpoint to represent the most worked chain.
Monero's super expensive PoW also makes it very hard to interface with other smart blockchains that may want to verify the amount of work behind a Monero block, or to support useful techniques like flyclient [1].
