Reason for identical Fulfillment.serializeBase64Url and .serializeUri?

[sbellem]

The two functions are identical:

/**
 * Base class for fulfillment types.
 */
class Fulfillment {

  serializeUri () {
    return base64url.encode(this.serializeBinary())
  }

  serializeBase64Url () {
    return base64url.encode(this.serializeBinary())
  }

Is one preferred over the other moving forward?