it depends on your personal goal.
If... you want to train and use the players for your club, but not go into it extensively, i would choose #1.
I chose a 5/3 last season, and i only trained him for this season, and i do not plan to take it any further.
If... you want to sell quickly, then the second... seeing as he will have a nice high price tag on him.
Reasoning: your a D.5 team. youdont have the highest income in the world. If yoiu were to properly train #2, then you wont have the money for him after 2 seasons (most likely) It will cost your club too much. While training the 1st guy will have quite a large sum on his cheques, he will be more of a quicker advantage to your club and towards a cause of helpoing your team win games.
I suggest 1st guy, But they are both very good draft picks and you would be luckey to get eaither.