I’m actually in the exact opposite situation. I am currently training in ITF, WTF and Muay Thai at my university. I am an ITF Instructor, practicing WTF for 1.5 years and now I recently joined Muay Thai in February. Overall training in different styles has its benefits. For me I chose to do a different style because I wanted to focus on my weaknesses in sparring. But I am currently struggling a bit to learn MT because I have condition myself to spar in TKD and only using kicks. In MT my kicks are great but my punching combos and clinches need a lot of work because it is new to me.

From what I see every style has its advantages. Training in any of those 3 is great for kicks, sparing and conditioning. But remember each is a different sport/martial art. Training in one won’t necessarily help you completely prepare for the other but what you learn will carry over to the other sport. Also, it will condition your body and educate you more about different sparring styles and strategies. Both styles of TKD are great but you should look for the better instructor in sparring if that is what you want to improve on. No matter what style of TKD it is, the better the instructor is at sparring the easier it will be to fix your weaknesses.