In practice very little difference but, yes. As it’s CO2 based. 330 has a higher CO2. Note this is only for where I live. Every country has its own rules…

Why not a touring? A sedan is so impractical. Touring also looks better IMHO.

A 320i is fine as a daily. Don’t listen too much to the Americans on where who don’t pay our high fuel prices/taxes/insurance :)

It’s also very dull…

The only correct answer.