Uber does minute-to-minute dynamic pricing, so any one ride isn't indicative of the actual cost. It may well be more expensive, but one or two ride anecdotes would not prove it.
I've seen dynamic prices to be 200% base, I've heard it can be even higher, like 300%. With regular taxis during rush hour, or a concert, or during a snowstorm, or during drivers' dinnertime, the price stays the same but availability disappears. With Uber, availability stays but prices go up, manyfold sometimes.