RE : nayeon vs jihyo! whose solo will do well?

Nayeon is the most popular member in SK, it's not close. She would definitely do better from a physical sales standpoint. She's also the most recognizable so she has the best chance of catching the GP's ears, however you never really know what will happen with domestic charts.

Nayeon. She’s more popular, especially in Korea, and the face of Twice. Her concept will most likely be closer to Twice’s so she’ll keep more of the group’s fans. And even though Jihyo is the better vocalist between the two Nayeon’s voice is the one associated with Twice and way more loved in Korea

probably nayeon will do better but that doesn't mean jihyo will flop or anything

it means they will both do well just one might be slightly better