I don't think laptop i3s have HT, Unless that has changed.
Used to be:
I3 - 2 cores, low cache.
I5 - 2 cores, medium cache, hyper threading. 4 core laptop i5s are new, and much needed.
I7 - HQ series were typically you're 4 core hyperthreaded chips with higher TDP. Other i7 chips can be dual core, more cache, with a higher clock speed than a comparable i5. Personally I think they should have just called it something else.