What are the differences between the miracle ultramatic and the omega 4000? Will they juice wheatgrass? What about parsley?

All centrififugal ejection juicers are not optimal to juice things like wheatgrass, and I do not reccomend it, since it will bog down the motor, and not yield much juice.. It would also probably shorten the life of the juicer. Its better to get a wheatgrass juicer for that..

The ultramatic is a good machine, in its day (it was out before the 4000), but now we prefer the 4000 due primarily to the 15 yr warranty, vs the 3 yr on the miracle ultramatic. Also the miracle has a 1 piece plastic framed with stainless steel strainer, on the 4000, its a 2 piece- cutting blade/strainer which is all stainless. Due to the design of the ultramatic, would probably be a bit more effective at juicing parsley since it ha a smaller feed chute, and the spacing of the teeth on the cutting blade... The 4000 and ultramatic are both good machines. We prefer the 4000 for durability, and the 15 year warranty. The 4000 is made here in the USA, and the ultramatic is made in Poland.

Hope this helps.