So what are the claims of the Promised Messiah, may peace be upon him? Our beloved Holy Prophet Muhammad Mustafa (the Chosen One), may peace and blessings of Allah be upon him, informed us that Hadhrat Isa (Jesus), may peace be upon him, will appear and also there will be the coming of the Imam Mahdi.
Of course the companions of the Holy Prophet were expecting them to come straightaway, but in fact the Holy Prophet, may peace and blessings of Allah be upon him, told us that they will come in the Latter Days, when Islam would be in a dire state.
Since then, Muslims have been waiting for these two personages to appear in the world, whereas Ahmadi Muslims believe that they have come and in fact, they are spiritual titles which found fulfilment with the coming of Hadhrat Mirza Ghulam Ahmad, may peace be upon him, who was informed by Allah that he was in fact the true claimant to both these spiritual titles.
This is the difference between Ahmadi Muslims and non-Ahmadi Muslims - that we have accepted the fulfilment of these claims in one individual, whilst the non-Ahmadi Muslims are still awaiting the coming of two separate figures.