>>1924842
Correct there are speed skills (acceleration) and power skills (velocity), I was using JP terms sorry for the confusion.
Speed boost or overtake skills during last spurt; mid-spurt activation is ideal (e.g. Straightaway Spurt, Rudolf unique, Special Week unique, etc).
Late last spurt activation accel and speed skills (e.g. Oguri's last 200m and El Condor Pasa's uniques, etc) also aren't good simply because these activate too late in a very long last spurt to matter much. Your horse can't push higher from top speed, that's why green skills that modify your speed cap are better than just more accel. There is a reason people don't use Homestretch Haste outside of TT because of high rng.
The difference between Redshift and Encroaching Shadow/Straightaway Spurt is that ES/SS can activate on the straight before the 3rd corner letting you hit top speed much sooner. While Redshift/Shooting Star are way too late, your horse will have already reached top speed by that time.
Pic rel is Rudolf winning with only her unique, I've added some examples into the sheet.