For the MonadError in Haskell at least, it's quite similar. However, mtl-style has a number of issues that effect systems don't well explained by the author of

For the MonadError in Haskell at least, it's quite similar. However, mtl-style has a number of issues that effect systems don't well explained by the author of effectful under "What about mtl?" at https://hackage.haskell.org/package/effectful https://hackage.haskell.org/package/effectful.