Having owned both,the GT a 04 2.0 JTS and currently driving a 2.2 Brera,I would prefer the Brera but that's just my own personal taste
Great sound,lovely to look at,great to drive and put a smile on your face,bit smaller up front for the driver,I am 6ft 3 but I fitted perfectly,the back seats you can fit people for a short journey.
Windows whistled at 100k ,bump and rattles from the suspension and squeaks,my brother owned a selespeed one,I had the manual,he had a lot of trouble with selespeed,but in my opinion I preferred it,made it feel special
Great sound,pulls like a train,the interior is a much nicer place to sit in,really feels much better quality and special,great spec on both cars,the glass roof is lovely on a sunny day,up front you have more space,but in the back there is practically none,
I would gladly own either,both are special places to sit,most important thing is service history,I would recommend driving both cars and see which one you prefer,if you are around cork anytime,more than welcome to drive mine,
Hope this helps ,either way you go prepare for a smile on he face everywhere you go,but to stop at the petrol station to pay for the happiness