These two stocks have surged over the past year, but one is a better buy for investors today.It's been an up-and-down year for speculative growth stocks.Flying taxi maker Archer Aviation (ACHR 0.12%) plans to launch in the United Arab Emirates (UAE) as soon as next year, which would bring its electric vertical takeoff and landing (eVTOL) vehicles to paying customers for the first time. Archer Aviation stock surged, reaching over $14 per share, but has since fallen 41%.While Archer declines, one space compan ...