Just in case anyone is wondering
what exactly is the difference between
products GPS-10920 and GPS-11058:
https://www.sparkfun.com/products/10920
https://www.sparkfun.com/products/11058
One of them says “GPS Logger”.
In the GPS Buying Guide,
https://www.sparkfun.com/pages/GPS_Guide
it says “GPS Data Logging”
under bonus feature.
This has to do with “limited on-chip logging”,
“Internal flash for optional 75K point data logging”.
Both products support external logging
using a SPI flash memory chip.