A field study in Taiwan put two pedestrian navigation interfaces head to head and found the tradeoff is not about accuracy.

Pedestrian navigation apps mostly show you the same thing: a flat map with a blue dot and a route line. Location based augmented reality offers an alternative, overlaying directions on the camera view of the street ahead. Which one actually helps you walk to your destination faster?
A field study in Taiwan put the question to the test. The authors built two versions of the same bus stop finder, one using a 2D map interface and one using location based AR, and gave both to the same ten participants.
Participants were students aged 20 to 28 who used Android phones daily and did not know the test area. The study ran in Zhongli District, Taoyuan City. Each person completed two scenarios: a blind search, where they had to find a location given only as a name, and a directed search, where they picked a nearby place and followed the guidance. They did both twice, once per interface, with different destinations of equal distance to head off any learning effect.
The authors measured completion time and success rate, then asked each participant to fill in the short form of the User Experience Questionnaire, which splits experience into pragmatic quality and hedonic quality.

Both interfaces got everyone to the destination, so success rate was a tie at 100 percent. Time separated them. The digital map was quicker in both scenarios: about 4.99 minutes against 5.45 for blind search, and 4.91 against 5.20 for directed search. The gaps are small but consistent.
The questionnaire told a different story. Pragmatic quality scored higher for the digital map, 1.90 against 1.53. Hedonic quality flipped the other way, 1.48 for AR against 0.53 for the map, and the overall score also favored AR, 1.50 against 1.21.

The authors read this as a familiarity effect. People already know how to read a map, so the map wins on task performance. But the AR view, with real street scenes annotated in place, was more engaging and more memorable. They describe the two as close on usability overall and suggest combining their strengths rather than choosing one.
Brata and Liang (2020). Comparative study of user experience on mobile pedestrian navigation between digital map interface and location-based augmented reality. International Journal of Electrical and Computer Engineering.