csr260 or 620s?

[totalbunt]

Hi all
Am after some advice/views/pros and cons of a csr260 vs 620s or maybe 420, Think useage will be mainly road with a few track days. Am going round in circles changing daily ,i really enjoy not just the speed (which im not knocking) but the whole experience including the noise, loved the noise of the csr which the 620 didnt seem to be the equal of or is that just my hearing going!! any comments gladly received
many thanks Bill

[totalbunt]

Thanks for your replies
performance wise is there a real world large difference between the two? and does anyone know of any reliability issues with the supercharged durateq or likely refresh intervals / how many miles is the engine likely to be good for?
have seen csr"s for sale with 25000 + miles so the csr engine seems to be pretty reliable ?

[totalbunt]

thanks
the refresh you mentioned, does that apply to the csr engine as well ? and if so would this be needed every 5-10k ?