I ran some numbers (approximate of course) on the following three build styles through level 7 (I plan on running through level 20 but have only done through 7 so far) for an OT. He started as (only listing arguably the top 4 most important OT attributes)
Str 18
Blk 14
Agi 14
Vis 13
I started at the beginning of a season.
1. "Slow" Build where you do the following
a. Create your player (in this case an OT), do not assign 15 points, do not buy eq
b. Sign to a team and train on intense until you're out of money, then switch to normal, then relaxed
c. Do not spend SP right away; soft cap attributes (those you want that high) ONLY when you have enough SP
In this player's case I trained Strength while waiting on the points to soft-cap. I got enough at level 4, and switched to train blocking. At level 7 this player has roughly the following:
Str 49.93 Blk 20.24
Agi 15.98 Vis 14.98
And this player had 19 sp waiting to be spent to soft-cap blk, which for comparison's sake makes his blocking 39.24. This player reached level 7 the day of Game 10, or 20 days into season 1.
2. "Super Slow" build where you do the following:
a. Create your player (in this case an OT), do not assign 15 points, do not buy eq
b. Train on normal for the first level, then switch to relaxed until you're out of money then sign with a D team.
c. Do not spend SP right away; soft cap attributes (those you want that high) ONLY when you have enough SP
In this player's case I again trained Strength while waiting on the points to soft-cap. I got enough at level 3, and switched to train blocking. At level 7 I had enough to soft-cap blocking, so at level 7 this player has roughly the following:
Str 49.54 Blk 49.12
Agi 15.98 Vis 14.98
This player has 0 sp left over. This player reached level 7, 17 days into season 2.
3. "Normal" build
a. Create your player (in this case an OT), assign 15 points to a single skill you intend to softcap, buy eq, usually +stamina
b. Train on normal
c. Spend SP right away in your first primary attribute you intend to cap while training the second one.
In this player's case I trained Blocking while putting all points into strength including the initial 15. At level 4, he soft capped str and switched to train Agi while putting points into Block. At level 7 this player has roughly the following:
Str 49.98 Blk 36.23
Agi 18.84 Vis 14.98
And this player had 0 sp waiting to be spent. This player reached level 7 the day of Game 10, or 20 days into season 1.
I can provide the numbers in spreadsheet form if anyone's interested.
It's hard to say where the advantage lies. There's really no major advantage to "Slow" Build (120.13 - sp in the four attributes totaled) vs. "Normal" build (120.03), as long as normal build focuses on soft-capping initially - I think this is the key. If you assign your points evenly throughout your first few levels you lose a lot, especially a lot of the later leveling bonus to your primary skills.
And if you compare where the "Super Slow" builder is at the same point in their careers', the "Slow" and "Normal" builds have a huge advantage over them. On the other hand if you compare them by level it's a different story. A level 7 "Super Slow" build is almost 10% better (129.62) than either "Normal" (120.03) or "Slow" (120.13) level 7. But by the time the "Super Slow" hits level 7 the other two builds are far, far better due to playing time and experience.