On the question of how HyperThreading affects partition of core resources, you might check the Intel Architecture manuals for information on the CPU family of interest to you.
Several of the important resources are shared dynamically between the pair of logical processors, so that a single thread can utilize all of them, provided that no other thread interrupts their use on that core. When I last studied the matter, ITLB was an exception, where a thread could use only half the entries for that core, even when HT is disabled. It was said that architects believed that most applications which would run best with HT disabled did not need the additional ITLB, due to (assumed) higher instruction locality than those for which HT was designed.
Documents on such matters for new CPUs tend to remain under non-disclosure for a while after the CPU is released to market.
It's probably possible to run specific tests to see how much of the resource a thread can use.
