Hyper Threading Vs Dual Core / Multi-Core is probably more about price than performance. Having Both is always the best, and typically if you have a choice it is between 4 real cores or 8.
I didn't say it in the video, but if you had the choice between 1 core with HyperTheading and 2 cores without. You should get the Dual Core (2 core) but most of the time you won't be presented that choice so I talked about i5 and i7 with 4 cores with and with out hyper-threading
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