Cervelo S3 or Madone

I’m considering purchasing a Cervelo S3, but none of the stores in the area have one for me to test. Does anyone know if it rides similar to a Madone or Emonda? I was able to test ride those bikes. Also, can you put a little wider tire than a 25mm?

It’s an Aero bike, so it’s similar to Madone.

Also considering an S3. Not sure about the rim version, but the disc has a ton of clearance so I don’t think you’d have any problem fitting 30mm tires if you wanted to.