I just got into smart phones, what is the difference between say Samsung J3, J6 or others? I know even in J3, they have different models like the latest is J3-V. The same question can be asked about I-phone 5, 6, 9 and others. Is J3, J6 equivalent to CPU like I3, I5 and I7? Is the different models on J3 is like different generation of I3. Like you can have I3 CPU, but the 8th generation is better than the 4th generation etc.? In another words, they will still come out with newer J3 like they will come out with the 9th or 10th generation CPU I-3.