I have the Carenado version, it is one of the best Carenado add-ons, my recommendation is get the SWS version, SWS is a much more active developer and will keep updating the product and making it better, Carenado rarely makes an update and when they do they are simple fixes I have never seen a big update in a Carenado product, ever.
Since the Carenado version is not really that different I haven’t purchased the SWS version yet, I wish they (SWS) had done the NG first and then it would have been an instant buy with or without the Carenado plane.
Get the SWS if it is worst than Carenado in anything it will be better sooner or later.
Just one word of caution: SWS flight models are quite strange, the Kodiak has some quirks and the PC12 too if they think it should fly that way you are out of luck with an update.