Keep the 35mm F/1.4 or replace it with 35mm F/2?

Sorry I could not find exact same topic. So if there is any please lead me to that post.

Question is simple: I have 35mm F/1.4 and works well with X-Pro2. It is slightly big but better than 56mm...

Should I keep it or replce it with the new 35mm F/2? Speaking of:

• IQ? - F/2.0 is not too bad?
• WR - better to have but it is not the deal breaker
• Focus - difference?

I have X-T1 but still, having two lense at same focal length sounds funny.

Thanks!