IonQ vs. Rigetti Computing: Which Pure-Play Quantum Stock Actually Has the Technology Edge?

IonQ and Rigetti Computing are pursuing different quantum computing technologies with distinct trade-offs. IonQ uses trapped-ion technology with superior accuracy (99.3-99.5% fidelity) and all-to-all qubit connectivity, while Rigetti uses superconducting qubits with faster operations (60 nanoseconds vs. 950 microseconds) but lower accuracy (99.1% fidelity). IonQ currently holds the technology edge with demonstrated error-correction progress and DARPA Stage B advancement, but its lead is not secure as both companies face challenges scaling their systems while maintaining performance.