Parallax is the apparent shift in the position of a star against the background of more distant stars as the Earth orbits the Sun. The closer a star is, the greater its parallax.

Arcturus is closer to Earth than Vega, with a distance of approximately 36.7 light-years compared to Vega's distance of 25 light-years.

Therefore, Arcturus, being closer, would exhibit a larger parallax than Vega.