@dedeatanasio The NV50S gives you more stitches and they are both great machines! You would be happy with either but for extra stitches the NV50S would be a good investment.
The on,y issue I have with this machine is that it is so so easy to move the stitch dial when reaching over for something. Don’t notice till you start sewing again 😳
Hi Ana successful sewing with denim, PVC and vinyl is dependent on your needle, the foot you use and the machine. The NV50S will successfully sew these products but you may need to use a different needle and a teflon foot. www.echidnasewing.com.au/f007-non-stick-foot-7mm-models