It's gearing that controls overall speed and acceleration. A high kV motor geared down is theoretically going to be very similar to a low kV motor geared up. A lower kV motor will have more torque (turning power) than one of high kV.
Also, the Speed Passion motor is likely to be very similar in construction to the Novak, so will probably suffer a similar fate to the Novak you have. That's why people pay stupid money for Neu motors (about £150-200) as they have far better rotors which don't break up. This has always been a problem with the cheaper motors (especially the Feigao based ones - like Speed Passion and LRP), which also get quite very hot.
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