I tried to do a google search and one on here to find a spec sheet on the E4X but only saw E4XT and E4XT Ultra.
How noticibly slower is the processor on an E4X versus the RISC on the ultras?
What features, other than polyphony, do ultras have over an E4X?
Looking at an EMU manufacturing timeline, the same year the 6400 classic was made, the E4X was the model that followed right after. Would you happen to know if they share the same DACs?