I just wanted people to not be confused- COB is the newest technology*- here's an inforgraphic with key differences:

As to what the styles are called- you can call them anything- omni directional vs uni directional, flat panel vs bulb style, etc. They just are not COB LEDs, though you can get 'corn cob' style in a true COB- here's one with COB on the side, and an SMD on the end:
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* I should add- as of ~noon, 5/7/2015 - tomorrow may be different :)