I've always heard that arabica are better quality and have a lower caffeine content but I actually like the bitterness of robusta. Is it just me? Maybe its the tolerance to caffeine that I've built up over the years that has me craving something stronger...
It's about taste, so I think everybody has different opinion, but YES arabica is softer that robusta , I also like robusta because I think it's stronger than arabica
Robusta is really good to a certain amount in your espresso blend.
In Italy most cafes mixed it in their espresso.
But you have to experiment how much you like.