Bottecchia steel or Olympia aluminium

Hi everyone.

I have to decide which bike I want to get between these two (they both fit fine). For free, so there's no monetary consideration attached.

1. Bottecchia with steel frame and Shimano 700CX 3×7 complete groupset.

2. Olympia Marathon with aluminium frame and Shimano Acera 3×7 groupset (the saddle is momentarily missing from the pictures and the driveside picture is a stock image since I didn't get a shot of that angle).

What would you choose?

Thank you for your input.