The right FC 27 edition is not automatically the one with the most extras. It is the one whose extras match your routine. Someone planning regular Football Ultimate Team sessions has a different buying decision from a Career fan who wants a long save, or a group that only plays together on Friday nights.
Both Standard and Ultimate include the full game, with features subject to platform support. Standard is not a reduced selection of the core modes. Ultimate adds a bundle of benefits around that base experience. Start by pricing the things you would genuinely use, then ignore the things you would never have bought separately. That is a more useful comparison than counting the number of lines on an edition chart.