It is not possible to compare one bit converters and "normal" PCM converters directly, the working principals are so different.
With PCM converters the signal is basically sent thru a gate, which flips when voltage is half of maximum. If it is, the most significant bit is set to 1, next to 1/4 gate, then 1/8 gate and so one. This happens once for each sample, typically 44100 times a second. We have relativelly few samples (but enough to describe the signal), but good measurement of the amplitude.
With one bit systems we have extremely high sample rates, but the lone sample just records the change, is the next sample bigger (higher voltage) than the previous. If yes we get 1, if smaller, 0. If we have enough samples this system also can record the waveform well enough. To describe a signal with accuracy of 16 bit PCM we need 2^16 as many samples per second or 44100*65536=2,889,037,600, almost 3 billion samples per sec. To compete with 24, even more. This gets unpractical and normal PCM is now prefererd. The high sample rate of one bit systems is nothing to write home about, it is not any advantage, just the way that system operates.