One's made in Germany and one's made in the US. OK, that's a bit of a wise crack, but not too much. The '03 is a copy of the Mauser, so much so that I think the US paid a royality to Mauser for a while.

The problem with both of them is that it's hard to know what you are getting. Where have they been for the last 100 years? I would not buy either with the intention of shooting it unless a competant gunsmith assure me I could do so.

I don't know how one could say the 700 is a simplified Mauser, they are two different ways of doing things.

As has been suggested, I would look at a Ruger 77, although there is nothing wrong (and a lot right) with a 700 if you don't want the controlled feed feature. Then there's the model 70...... (in its myriad versions)