Looking at STw Driver at 10.5 , shafting with Prolite 35 R flex at 45″ or Prolite 35 HL at S flex – will launch angle be similar with either, Advantage for HL to older player?

I play a Mizuno T ZOID 9 DEG with Prolite 35 S at 44.5″ now – get about 240 when I catch it – MID ball flight. 62 years old.