I don't quite get how the SPG program works. From what I can tell the SPG points are worth more than the Marriott points but they transfer point to point?? With the new SPG headstart program you can earn 1500 SPG points on your first stay and 2500 on your second. Which sounds good but if they only transfer one to one I think I'm better off staying at Marriott and getting by night credit. Don't know if that makes sense but appreciate any help.