5-inch gravity feed: Wallenstein BX52S ($5,150) vs Woodmaxx MX-8500G+ ($2,695). Same capacity. Both self-feeding gravity. Woodmaxx has the 7-year MX-Series warranty, Wallenstein 5 years. At nearly 2× the price, the BX52S wins only on build weight and dealer service.
6-inch gravity feed: Woodmaxx MX-8600 ($4,790) has no direct Wallenstein peer — Wallenstein jumps from 5-inch BX52S straight to 7-inch BX72S. For 30–45 PTO HP buyers wanting 6-inch hydrostatic-assist feed, the MX-8600 is the only real choice in this comparison.
7-inch gravity feed: Wallenstein BX72S ($7,840) has no direct Woodmaxx peer in gravity-feed — Woodmaxx’s 7-inch class is only in the WM/MX-8xxx hydraulic line. Compare the BX72S instead against the hydraulic-feed Woodmaxx WM-8H ($4,095, 8-inch) — which gives more capacity and hydraulic feed for $2,400 less.
8-inch hydraulic feed: Woodmaxx MX-8800 ($6,225, 7-yr warranty) has no Wallenstein peer. Wallenstein’s only hydraulic-feed chipper (BXH42) is a skidsteer-mount 4-inch — not a 3-point hitch attachment. If you want hydraulic feed on a tractor PTO, Woodmaxx is the only choice in this comparison.
9–10 inch PTO: Woodmaxx MX-9900 ($6,995, 9-inch hydraulic, 40–100 HP) vs Wallenstein BX102S ($9,240, 10-inch gravity, 80–120 HP). Different buyers: the MX-9900 fits 40+ PTO HP tractors with hydraulic feed; the BX102S requires 80+ PTO HP but hits 10-inch capacity. If you can run it, the BX102S is the largest PTO gravity-feed chipper we cover.