It comes at a premium cost for being made in the US, but I would say, based on reviews, that it is likely a better knife use experience vs the leek and flat out. The Kizer you mentioned is going to be, at worst, a tie for quality of assembly, but arguably a step down in edge retention (VG10 vs S30V).
The Fastball is part of an overhaul of Gerber’s knife lineup as they try to shed the stigma of being a low-quality knife brand, and they went in a good direction by releasing a practical manual S30V bearing flipper (although arguably mis-stepped by going for all-aluminum handles). If country of manufacture is important to you, Gerber is one of very few companies releasing US-made bearing flippers with good blade steel under $200.
I wrote that press-release-sounding blurb mostly as an explanation as to why that knife costs as much as it does. It’s probably not inherently better as a cutting tool than the Kizer, but you might have sociopolitical reasons for choosing the Gerber regardless.
