Question: are tn630 and tn660 the same?
Answer: TN630 =1200 letter size pages per ISO standards, AND TN660 =2600 letter size pages per ISO standards with normal settings and grey scale averaged and also 1 sided printing. The 660 lasts longer as it was designed to. 630 costs less. You get more usage out of TN660 than TN630 and you save money.