35mm is wide angle on ff camera. For street photography usually, 50mm is considered closest to human's eye view and best to create distance between subject but still close enough to be personal. If you primarily shoot background scene 35mm. If you like to have human element, 50mm (if got) is better all rounder. If you are sneaky type, longer prime would be ideal.

Resolution is not just about blowing up to canvas size. Its about leaving enough detail for cropping. With higher mp, it can sometimes compensate longer tele lens by cropping out the frame.