Whichever.
When does a stat become meaningful?

Hitters
 50 PA: Swing %
100 PA: Contact Rate
150 PA: Strikeout Rate, Line Drive Rate, Pitches/PA
200 PA: Walk Rate, Groundball Rate, GB/FB
250 PA: Flyball Rate
300 PA: Home Run Rate, HR/FB
500 PA: OBP, SLG, OPS, 1B Rate, Popup Rate
550 PA: ISO

Pitchers
150 BF – K/PA, grounder rate, line drive rate
200 BF – flyball rate, GB/FB
500 BF – K/BB, pop up rate
550 BF – BB/PA