AGS-001: Game Boy Advance SP, first model with frontlight ("Advanced Game Boy Sp (ecial)") AGS-101: Game Boy Advance SP, second model with backlight ("Advanced Game Boy Sp (ecial)") OXY-001: Game Boy Micro ("Oxygen", the Micro's codename) In addition, AGB-101 is often used as the unofficial model number for a regular Game Boy Advance modded
The 101 mod can be solder free if you get a good adapter and don't mind it not being max brightness, you'd need a 32pin board + white connector 101 replacement lcd from a place like aliexpress, the extra brightness is like the number 4 setting on a ds lite while the lower brightness is a 2 I'd say, I added a hidden switch on my 101 modded gba
WMhy.