hi! thank you so much for your interest!
A riso print is made with a risograph printer, which uses a limited amount of vibrant ink colors and a process similar to screenprinting to create prints. Because of the constrained color choices, how they mix in printing, and the calibration of the ink layering, you tend to get a much more unique result that doesn't try to directly copy the colors of an image like a digital print does.
Also, some of the inks are really bright (close to fluorescent marker colors), and it's kind of hard to show on screen just how punchy they are but the effect is one of the reasons riso prints are so popular!
For example, here's the sydger DJ piece as a riso that @ceeejus and i are still in the process of tweaking. this is made using only teal, light lime and fluorescent orange inks. The photo on the right is of the regular digital print.
a better example maybe is of my mlpf print, which has the craziest color difference:
my phone camera was really struggling to not make the digital print on the right look like it's gray in comparison....(I promise it's not)
lastly, riso is a bit more laborious+time consuming process the materials for which are less easily obtained, which is why they cost a few $ more.
Ultimately the choice comes down to your stylistic preference. I hope this helps and thanks again!