The earlier Made in Japan Vamos' had a reclining front seat with a vertical bar that looks like a roof support.  The newer Made in China ones have shorter seats that don't recline.  The Japanese models also have a detailed undercarriage compared to the featureless baseplate of the newer ones.

The earlier version:  

1D wheeled Vamos

1E wheeled Vamos

Packaged for the US in Pocket Cars blisters

The later, made in China ones.

Honda issued Vamos with some additional detailing.

30th Anniversary reissue in a look-alike black/yellow box.

This Vamos was part of the Special Model Set No. 6