tracker reflects the daily price, the price cap reflects average price looking backwards over 6 months.Why wouldn't you? It was always going to be higher in winter than in summer, that's the whole point. It'll still likely balance out to be cheaper overall than fixing.
Tracker wins in a falling market as it has gone over the last year because you get to the cheapest rates more quickly. Price cap wins in a rising market because you delay the higher prices getting you.
In a flat/slightly rising market like we have now, they should work out to about the same on average. The only way you can ‘win’ on tracker is if you can shift usage between cheap and expensive days.