Intel's classification of Silvermont parts as Atom,Celeron or Pentium is so whimsical. Very confusing, the person who commented about needing a cheat-sheet is right. Looks like Intel has overemployment in their marketing department, they could increase their profit margin by firing a few people from that part of the company.
There is not big enough difference between these parts to form a definitve pattern, these SKUs are not easily sorted into one of the three brands depending on TDP, frequency or number of cores. Instead we have high TDP Atoms as well as Pentiums. High frequency Celerons as well as Atoms. They are slicing this cake too thin. Ugh.
The only pattern in the madness is Intel's capricious desire to segment Silvermont as I (Integrated?), M (Mobile?) and D (Desktop?). Maybe this kind of artificial segmentation allows them to charge different prices from ODM/OEM for two SKUs even though their performance might be embarrassingly similar.
Whatever. Frankly, all these Silvermonts could have been sold as just Atom, further fortifying that brand. I would have liked that very much. This just reeks of marketing gone wild.