Are you frustrated with the very expensive licenses and maintenance costs of running Oracle? Does it take (unnecessarily) a big shunk of your IT budget? If it's the case, you are probably paying based on the number of cores on which the system runs Oracle.
IBM Power has the advantage that Oracle cost is limited to the number of cores used in the VM (LPAR on Power) where Oracle is running, instead of the number of cores of the whole physical box as applicable for the competition.
Besides, the performance of a core on IBM Power is more than twice the performance of a core on X86… so less cores are needed on Power to obtain the same performance as on X86. Combining both above parameters can make an exponential difference in pricing.