Seans kit give the pup more volume and pressure. Plus he gives you the kawasaki o ring to help prevent the ebow from pulling out of the block.
The pcw kit has similar oil pump upgrades plus it replaces some of the plumbing. Its a bit more work to install.
I never tried pcw's kit so I can't compare the two with first hand knowledge. I have seans kit, plus I have a COO pop stopper as backup insurance to prevent the elbow from dropping.
I don't think you can go wrong with either kit.
Check PCW's website, they have the pro oiler installation instructions available for download
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