angle

Hi all, Current equipment at my Cube Reaction Hybrid Pro ebike is: Stem - CUBE Performance Stem Pro, 31.8mm Angle 6, lenght 90mm Bar - CUBE Rise Trail Bar, 680mm I got new Bar - 780mm, 35.0mm I need to buy new Stem with 35.0mm clamp. Should I take the same Angle and lenght or smaller?