I tried Softcup, they are completely different from the Diva - the fit, insertion/removal, just very different. I did not like the Softcup, they leaked, were a pain to remove, very messy, and I could feel them. I didn't even make it through one cycle with them because I disliked them so much.
I have a Mooncup (different brand of Diva) and love it. I've had mine for about 4 years, so I should probably replace it but it still works fine; I just make sure to sterilize it with vinegar & peroxide after every use.
I can't feel the Mooncup at all when I wear it, very comfortable and easy to insert/remove once you get the hang of it. Not messy at all once you get comfortable with them, usually takes a cycle or two.
ETA - very, very easy to clean. I have a medium cycle and empty twice a day; in the morning and at night. Mornings I do it in the shower, so just rince, wash with soap, rinse again, and reinsert. At night I use the 1/2 bath so the sink is right there; empty into toilet, wash & rinse, reinsert. At the end of the cycle you wash it good then put it in a cup 1/2 vinegar 1/2 peroxide and leave it overnight. That's it!