TRD Pro Leveling Kit - Coil Spring Seat vs. Top Plate Spacer/Shim

[rasber3140]

Curious to know the pros and cons of either of these options. I have narrowed it down to either a Toytec 1" lift spacer for the Pro or going the Cornfed route (or perhaps Coachbuilder shims). The only differences I can tell are one lifts from the bottom of the coil and the other goes on top.

Does one type perform better than another on the stock TRD Pro suspension? Any alignment benefits?

Thanks for any advice.