Cybercowboy777 made my point much better than I did, allow me to quote:
It is not about the exact notes or lyrics, it is about the formula. (thanks CC)
These are cookie cutter songs. Yes mechanically they are different, but that's just the mechanics. A cheesy lovesong is a cheesy lovesong is a cheesy lovesong, in the end they're all the same. And early in their career the Beatles were master of the cheesy lovesong.
What you're saying, in essence, is that a stick figure sketch of the Madonna is the same as a Renaissance master's oil painting of the Madonna because their subject is the same: the Madonna. Just say you don't care for the Beatles and be done with it. Your clinical justifications for your opinion don't hold much water.