Fingers

hello Is there a difference as far as curving the fingers or the different touch when playing Bach compare to the Classical time?

Both Baroque and Classical players had a lot more finger individuation the the later players - the wealth of articulations needed to create colours made it necessary. So it's not about curving the fingers more or less, it's about being able to bring more variation in curvature to your articulations to create a richer palette of colours. Thanks for the apposite question! AFF