The same beefy 2 way zips used by ToJ are also used by Barbour To Ki To collection, and they effectively chewed up my knits and scarves.
Excella zippers I have on Nanamica and Ten C also uses Excella, on the other hand, is much lighter and smoother.
Still, I think Excella is more for luggages, and its sliders are not really nice on clothes IMO. plus someone said its $75 to upgrade and that's bullshit upgrade price to pay for MiJ YKK to Excella
Source: Relative is a zipper retailer wholesaler so I grew up seeing/touching bunch of zipperes.
So are you saying you think Excela is better either way?