I can't even keep the Euro coolants straight. Some material suggests that G11 is G48 which is a silicated 2EHA, but that doesn't make sense sense G11 is suppose to be incompatible with other OAT coolant and G11 seems to predate 2EHA's use. I am pretty sure that G48 contains 2EHA though. G12 is straight OAT with I think sebacic. G12++ is silicated HOAT with sebacic. Your information seems to differ from that though.
Die old european "classic Green" is die VW G11 (G48 from Glysantin, TL 774 C)
BMW loves it, other manufacturer switchet to silicate-free cooling fluids..
VW with G12 (TL 774 D) had also a "DEX-COOL Desaster".
If you mix G11 with G12 this will happen:https://www.transalp.de/forum/beitraege/technik/wasserpumpe/?no_cache=1&tx_mmforum_pi1
(Use google translate to translate this to english)
(The corroded rotor of the pump is a good example of what happens when the cooling liquid has never been changed.)
The G12+ (TL 774 F) and G12++ (TL 774 G) and the new G13 (TL 774 J) are mixable with older Liquids.
Product line of glysantinhttps://www.mas-ft.de/kuehlmittel/
I use the G12+ from Glysantin (G30) for my Car (Seat Alhambra) and my Motorcycle (Honda Transalp 600)
The SEAT had originally G11 inside and that was written on the compensation tank.
I switched to G30 and wrote this on the compensation tank.