sorry i was asleep.
anyway, yup. the blue button models do not auto save, i found this out when my reseller warned me when i asked if i could switch from red button to blue button. she also gave me a link to their site.
blue button
+no scrolling bug
+less hassle
+- EEPROM is automatically taken care of.
-no Auto saving, requires a trick
red button
+auto saving, never lose your save files
+far more reliable way to backup your saves
+- EEPROM manualy taken care of.
-scrolling bug (a minor annoyance)
-more hassle when adding games.
they both rely on the same templates, so compatibility should be the same. there are reports blue is far more compatable, but this is a illusion. this is because it sets its first 10 games as eeprom yes and then the rest as eeprom no.
EEPROM yes and no have diffrent compatibility lists. for example, eeprom yes FF thearhythm curtain call works fine, but for eeprom no, its currently still not working. however with each update the compatibility is getting better. the update today from their site OVERWROTE the old update, likely because of serious flaws, like say, how new super mario bros 2 would REFORMAT the micro sd card if eeprom was no
with the new update, the game works fine.
also, you may notice i put EEPROM manual as +- in both red and blue, thats because its arguable. the convenience of blue is great, and the annoyance for reds to do it manually is obvious, however a red user can save their 10 YES eeprom slots for specific games. for example, today i used a YES slot on kdid icarus, cause i really wanted to play it. where as for blue users, untill the compatibility chart gets better, past their first YES EEPROM games, they will never be able to play kid icarus unless sky3ds site released new updates to make it compatible.
so, eeprom manual is a hastle, but it can also be used like a emergency miracle fix 10 times only for red users, for the games they want nomatter what.