Here's a link to dpreview's "studio comparison tool" that allows you to compare image quality of various cameras and also compare ISO performance. While the L340 and P530 aren't available options, there are many other Nikon bridge cameras that equal to or better than these two...
Here's a link to dpreview's "studio comparison tool" that allows you to compare image quality of various cameras and also compare ISO performance. While the L340 and P530 aren't available options, there are many other Nikon bridge cameras that equal to or better than these two cameras.
Personally, I would never recommend a super-zoom bridge camera like these to anyone who was concerned with image quality. While they look like mini DSLRs, or at least advanced cameras, they are nothing more than point-and-shoot cameras with a ridiculously super-long zoom range that you'll never use more than a few time to take a photo of the Moon. The longer the zoom range, the lower the optical quality - it's all a compromise. So why get a camera with lower image quality just so that you can have a 30x, 60x or 90x zoom that you'll never use more than a few times?
Since you care about image quality, these are not the cameras for you. Instead, go with a mirrorless Sony Alpha, Panasonic or Fujifilm camera, or a DSLR from either Canon or Pentax. I'd skip Nikon D3xxx series of DSLRs, so if you want a Nikon, start with a D5xxx or D7xxx series instead since the D3xxx doesn't have an AF motor which limits which lenses you can use. All of these mirrorless and DSLR cameras have much larger sensors that are almost 13x larger than the sensors in the L340 and P530. Here's a link showing you the difference: https://www.digicamdb.com/compare/nikon_...
You don't mention what you want to do with your camera. If you're getting it just to take photos of athletes on the field while you're in the stands, or take Moon shots, then these are probably a decent option. But for everything else, they are just not good enough. Not picking on Nikon here, even the equivalent models from Canon are really not worth considering if you're concerned with image quality. It's basically because of the super-small sensor and the poor optical quality of the super-zoom lens.
If you want to get a small camera, then consider buying a used Canon Powershot G series. These cameras usually sell or sold new for more than $500 and can now be found on eBay or keh.com for around $100-$200.