Having owned every variation including the berlina they all have their pluses and minuses.
But as anyone who has built a competition car knows, the engine is the last thing on the list. Any fool can go fast in a straight line.
Start with the handling so it goes round corners properly, then make sure it stops.
A well set-up 1300 coupe or berlina will be a much nicer driving experience than a poorly set-up 'fanalone', regardless of price.
Finally, buy the best you can find/afford because parts and labour aren't cheap.