I honestly could not care less about the number of cores of the microprocessor. Sure, the more the merrier, but again, the more the hungrier. You could stuff 128 cores in there that the machine wouldn't go 1ms faster for pretty much all tasks. What would be useful here would be a benchmark of this CPU with the iPad 3 CPU (which is clocked higher btw). Of course, all benchmarks are biaised, but still, that would give a few pointers for comparing both CPUs. I'm sure you're the guy that says the latest CANON camera is superior to competitor X because it haz moar pixels. Hint: it's not true. Another hint: 4 cores ain't necessarily better than two.
microSD slot is definitely a plus. I'll count that as one.
The OS is at worst a matter of taste, not a clear cut superiority.
And last, I don't know where you can find a new iPad3 these days, so I find it hard on your part to compare the new HP tablet to an old iPad model... The one sold by Apple is the iPad 4, which has an even higher clock rate.