These three are pretty much the same height and proportions, the only difference is that Dapper Neo is without heels (clown shoes) and he doesn't posess the ability to move his eyelids (only visors animations) unlike the other two.

The basic info is that they're from diff dimensions and there's a major timeskip after the events of Sonic Heroes, which went (or didn't at all) differently for each of them.

About them:

🌹 Amy Rose

Semi-retired hero finding her way in the world. She recently started a home baking business.

Amy is indulgent but strong-willed. Determined to befriend evil robots and tame them with her fiery charm.

She manages to demand great respect from the trio, especially Metal. Metal calls her Rosie, but she's Amy to the others.

💙 "Metal" Neo

Reformed Neo struggling to find his own self worth on the side of "good" with the help of his Amy (Rosie).

Metal is reliable but prideful. He's devoted to a fault. Rosie is his whole world.

Generally goes by Metal but forces Sonic to call him Neo.

♣️ "Dapper" Neo

Security bot conflicted between who he is and what he wants to be.

Dapper is as generous as he is covetous. Genuine, quiet. The most social one.

Amy (and Metal) nicknamed him Dapper. Wronger is partial to "Suit Guy" (or simply Neo).

🔪 "Wrong" Neo

Recluse mechanic struggling with the consequences of his freedom.

He's very charismatic but remains isolated. He's a loner, hard to crack.