Dude this is 2021 and we aren't on dial up anymore. You can find such stuff on internet and particularly on Youtube. Here RIS vs DLSS 1:
DLSS is interesting and real upscaler, but it had its faults and RIS was overall more useful technology and it looked better. However, DLSS is likely better at stupidly low resolutions:
FSR vs DLSS 2:
They are both pretty good, but it seems that AMD's FSR is better during motion and beyond that, it works on so much more hardware and likely will be way better supported than DLSS. It also doesn't need any extra hardware, thus it avoids RTX tax. Visually, FSR at Ultra Quality sometimes looks even better than Native 4K, meanwhile DLSS just tries to look not worse than 4K. In terms of pure visual quality FSR seems to be a tiny bit better, but in terms of practicality and availability, FSR undoubtedly beats DLSS. Also bonus points for AMD for not marketing it as mandatory to enjoy ray tracing at high fps. And on top of that, you can use FSR on performance and use RIS on top of it to give games extra performance and extra sharpness. DLSS doesn't have any sharpness slider or any adjustment beyond resolution, so FSR is more versatile too. The only cool thing about owning nVidia card right now is potential for combining DLSS with FSR, but that requires developers to implement them both in same game and it's unknown if that would help or be the worst of both. Anyway, FSR seems to be better at every front when compared to DLSS 2.