Dual C846 question

Dear collegues, does anybody have (or had) a Dual C846 cassette deck?
I did not see any technical data for it.
Sometimes this model appear at ebay.de (not as often as C844).
So the question, does C846 better, soundind or recordind better than C844.
Or any difference between C844 and C846?
The C844 looks better. But there is no C846 in my collection of Dulal's