Yes—if you have slim or low-volume feet, a narrow last boot can make a huge difference. The "last" is the foot mold the boot is built around, and a narrow last (typically under 95mm wide at a size 9) creates a lower-volume fit that hugs your foot instead of leaving gaps. This eliminates the slop and heel lift that wider boots cause for narrow feet, giving you much better response and control when initiating turns.
The biggest mistake riders with narrow feet make is sizing up in length to get more width—this just creates heel lift and makes things worse. Instead, look for brands that offer specific narrow models, and always try them on with your riding socks. A properly fitted narrow boot should feel snug across the midfoot and forefoot without pressure points, while locking your heel down firmly.