Quality was better or features? Big difference.
I owned a Crossroads before they halved their warranty and had leadership issues (my opinion). It was a great trailer - so when it was time to look at a bunkhouse I went to look at the Zinger. Long and short we went with Jayco. I did not find the Zinger better assembled and the oozing butyl tape everywhere and raw edges were a turn off; the warranty was also shorter.
I'm not sure why your comparing a Swift against a Zinger since they are two different products. Take a look at the regular Jayflight series for a level comparison.
Best of luck.