Oh definitely the first one. To me the height isnt that big of a difference, here is an accurate example of the difference it will make for these two.
Prospect A will train OD 0.56 every OD training week.
Prospect B will train OD 0.60 every OD training week.
Prospect A will train JS 0.56 every JS training week.
Prospect B will train JS 0.58 ever JS training week.
The difference is way too small, especially for players with the potential they will have, it wouldnt make a significant difference in the span of 3-4 seasons. I rather just start off with the player who is better.