Both the MP-T Series and the MP-52 PW should perform very similarly.
Really it's just personal preference in terms of head size and shape, and playing characteristics....the T Series will be a little bit smaller and probably closer to the Vokey you're currently playing in terms of head size and shape. Also, if you're playing the Spin Milled then you'd probably prefer the spin that you'd get from the T Series more as well. The grooves of the T Series are Milled in while the grooves of the 52s are stamped in during the precision forging process...the result is sharper shoulders in the T Series.
I hope that helps!