When a nanovor undergoes a metamorphosis their change is more than evolving. First of all its body form and color change. Its edicion gets reset to 1.0 and it's last name gets changed. As you can see below, giga striker 2.0 drastically changes into a Giga Siren 1.0

Ex. Giga Striker 2.0 => Giga Siren 1.0

Gigastriker 20 At3 a
Giga Siren 10 At1 a