Only if the other planet's orbits take them near enough to the black hole to get sucked in. The main difference between a primordial black hole at about the Ea

Only if the other planet's orbits take them near enough to the black hole to get sucked in. The main difference between a primordial black hole at about the Earth's mass and a planet at about the Earth's mass is the presumed density of dark matter around it. And I'm guessing there's more hawking radiation coming from the black hole than the planet. But small black holes with the same mass as the Earth have the same sucking power as the Earth since it's the mass that does the sucking.