The Rodono and Agco choppers are not the same, similar but there are differences. The Agco chopper has a large thick wall center tube,I think its 6 sets of 2 hammers on them. they have changed the bottom plate under chopper and added twice as many stationary knives (very similar to all other fine cut choppers) to make them chop, they have also sped up the chopper to around 2700 rpm I think. we have run these for 5 or 6 years now and are happy with their performance. The Rodono also has the same basic center drum but as mentioned earlier they have many more hammers on them around twenty sounds right but they use the standard chopper stationary knive slots and you can use Agco or whatever other knives you can make work. The Rodono chopper looks well built and was told they can run up to 3000 rpm, we went with the Agco ones because they were still considered prototype when we got them and therefore the price was atractive and also felt if they didnt work Agco may do something about it , otherwise would have bought the Rodono.