As far as I know:
- If your main goal is sprinting power, do it before. Fresh sprints will be higher watts, and increase capacity. It will likely hamper your subsequent workout though!
- If a higher sprint is a “side quest” you can get away with doing it after, when your main work is done. Caveat being that form and recruitment is super important in sprints. So if you feel like your previous work impacts these, don’t do the sprint! You don’t want to ingrain compromised muscle firing patterns by only ever doing fatigued sprints
As N=1 I tend to do it after workouts 
If I can’t touch 1200W peak I stop immediately though