Split the batch and use both yeasts to compare. The S-33 is crummy, though, and a fairly neutral, flavorless yeast that doesn't flocculate. T-58 is phenolic, and slightly Belgian-ish.
S-33 actually has some nice flavor if you underpitch it in a Belgian style beer. I just did this with an Allagash White clone and I've heard the same from Denny's Evil Concoctions. Underpitch and let the beer warm during fermentation. It is sensitive to temperature fluctuations downwards and can stall out if you aren't mindful of that as fermentation slows down.
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