不是的，兩個函數的功能是不一樣的，可以參考"stm32f10x_rtc.c"

/**
* @brief Waits until last write operation on RTC registers has finished.
* @note This function must be called before any write to RTC registers.
* @param None
* @retval None
*/
void RTC_WaitForLastTask(void)
{
/* Loop until RTOFF flag is set */
while ((RTC->CRL & RTC_FLAG_RTOFF) == (uint16_t)RESET)
{
}
}

/**
* @brief Waits until the RTC registers (RTC_CNT, RTC_ALR and RTC_PRL)
* are synchronized with RTC APB clock.
* @note This function must be called before any read operation after an APB reset
* or an APB clock stop.
* @param None
* @retval None
*/
void RTC_WaitForSynchro(void)
{
/* Clear RSF flag */
RTC->CRL &= (uint16_t)~RTC_FLAG_RSF;
/* Loop until RSF flag is set */
while ((RTC->CRL & RTC_FLAG_RSF) == (uint16_t)RESET)
{
}
}