Captain America vs Guardian

Both at thier best/peak in the following

1.H2H only
2.Both use shields
3.Whose shield is more powerfull i.e which one is stronger and more durable?

Who wins in each of the above how and why?

Guardian a.k.a. Vindicator a.k.a. Weapon Alpha?

the guardian from DC has shield http://en.wikipedia.org/wiki/Guardian_(DC_Comics) i think its jim harper the clone etc

Captain America in all.

Guardian never had much in the way of feats as far as I remember. He was mostly just an occasional supporting character through the 90's (the clone, that is)

Guardian is a legitimate superhuman though.

So is Steve