Grizzly sells two spiral cutterheads for its 15" planers (see below): the one made by Shelix and its own. The price difference is only $100. Can anyone compare the two?

Cary

H7655 15" Index Spiral Cutterhead



See larger image Your Price**:$525.00

Description
These cutterheads replace the standard straight knife cutterheads on our Grizzly jointers and planers. Each cutterhead has four spirals with indexable, four-sided carbide inserts, so each insert can be rotated for a new factory sharp edge. All cutterheads include 5 extra inserts, T-handle wrench, Torx bits and spare insert screws. These Grizzly cutterheads have an incredible finish, and are comparable to the Byrd cutterheads in quality of cut as well as the quality of the cutterhead itself. The inserts are imported from Germany.

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H7768 15" Shelix Cutterhead


See larger image List Price:$695.95Your Price**:$625.00


Description
Made in the USA by Byrd, these indexable carbide insert cutterheads are the best money can buy-period! The inserts are not only placed along a spiral pattern, they are also at an angle so that the shearing action leaves a glassy smooth cut on the toughest of woods. Each cutterhead comes with 5 extra replacement inserts.