@immortal-d
Cybran nano is a T2 Upgrade
Sera nano is a T2 Upgrade
UEF shiels is a T2 Upgrade
UEF nano actually dunno, might be possible on just T1 power
I don't see the reason why you'd compare those T2 upgrades with Aeon but the Aeon ACU isn't allowed to have the T2 Upgrades such as shield, chrono and advanced range.
Also the way shield and nano function are way different. Also check out how fast the Aeon shield regens. In addition to that Aeon advanced range is unique and can't be countered (Stealth gets countered by mere scout-spam).