The Sport is cheaper and has a higher refresh rate, but the video here shows significant differences between what the 2 are reading. So which is more accurate in measuring 0-60 and quarter mile compared to a timeslip?

EDIT: Vbox's reply in 2nd post

 

I got some excellent information from Racelogic's USA office:

"
The 20Hz VBOX Sport collects 20 samples a second vs the PerformanceBox’s 10 samples a second. Due to the Sport collecting double the samples it will have a higher accuracy for dynamic testing such as acceleration runs. For a normal road going vehicle the difference in accuracy between the two is typically negligible though. The Velocity accuracy is 0.1 Km/h for the Sport and 0.2 Km/h for the PerformanceBox, to give you an idea of the change in accuracy. I’ve also attached data sheets for both devices so you can compare the two.

Typically deciding between the two comes down to the packaging. The PerformanceBox has a built in display but is also a larger and less modern looking unit. The Sport doesn’t have a built in display but can be paired with a smartphone to see a live output. The sport is also splash proof and typically slightly more robust."

 

 

I have the vbox and now draggy as well.

The misleading part of this video, is that the vbox will display a reading, but when you upload the file to the vboxtools.com website, the website will be more specific.
Many times i would see a time on the vbox display, but once put unto the online tool, the reading was .1-.2 lower

 

I bought a vbox sport, and the iphone app is excellent so far

I'll compare accuracy to what cobb accesport reads for curiosity's sake