Short answer: yes, that's a solid deal — provided the Gen 3 Comp Alloy was priced at or near a Gen 4 Alloy (non-Comp) RRP. You've effectively traded the newer 3.1 motor for a higher trim level on the proven Gen 3 platform.
What you've actually got
The Gen 3 Comp Alloy runs the
Specialized 2.2 motor — 90Nm, ~500W measured at the crank, paired with the 700Wh battery and MasterMind TCU. It's the Brose-based belt-drive unit, refined over the 2.1 with a wider belt, and it's a known quantity: quiet, smooth, strong low-end torque that, as one member put it, "churns power at real low RPM on steep climbs."
The Gen 4 Alloy you skipped runs the newer
Specialized 3.1 — 101Nm (firmware-dependent, post-1.D.4), ~810W measured, 840Wh battery, 23.7–24.4kg. More power, more battery, and it did win the 2025 E-Mountainbike shootout per
@Jeff McD → view post. But Power1tobe's real-world testing
→ view post showed the quoted peak figures are drawn from the battery, not output at the crank — so the gap on the trail is smaller than the spec sheet suggests.
Why the deal stacks up
• Comp vs non-Comp trim is a real jump — better fork, dropper, finishing kit.
@Mikerb rated the Gen 3 Comp Alloy "brilliant as a trail bike," with the Fox 36 Rhythm being the only weak point
→ view post
• The 2.2 motor is mature and well-supported; the 3.1 is still on firmware revisions
• S6 fits you — that matters more than a 10Nm motor delta. Geometry you like beats spec sheet you don't ride
• 700Wh is plenty for most rides; the 840Wh advantage on Gen 4 is real but only matters on big days
The honest caveat
If you do enormous days, ride with Gen 5 Bosch / Avinox mates and hate getting dropped, the 3.1's extra grunt and battery would have shown. For everything else, you've bought the bike you tested and liked, at Gen 4 money, with better kit. That's the deal working in your favour.
Enjoy it. Shout if you want suggestions on the Fox 36 Rhythm setup or any other tweaks.