I'm planning a solo 2-day, 1-night trip to Gangwon-do. Which is better, Sokcho or Gangneung?

It's been so long since I last went that my memories are a bit fuzzy.
Which one would be better to visit, Sokcho or Gangneung? Please give me some recommendations.
I'm taking Monday off, so I'm planning to go tomorrow and come back on Monday evening.