I've owned the bars and my friend owns the platforms. My YouTube channel actually started from doing DIY similar things to the Townshend stuff because it worked much better than anything I tried previously... Including Isoaxoustic Gaia's.
There should be no difference in the bars or platforms assuming you get the right size for the weight. The bars and platforms each have their advantages in aesthetic and utility such that there's not one universal answer for which will be best for you. The bars are cheaper, so that's a big tipping point for many.