Hopefully GT-AX6000 is better because AC86U has better wall penetration than AX86U. On higher 149-161 channels AX86U is almost there, but still AC86U destroys it on lower 36-48 channels with better throughput and range. There are still more AC clients around. TP-Link Archer C80 for $50 beats AX86U in range on 36-48 channels. It beats it in throughput to AC 2-stream client in close proximity as well - 540Mbps for AX86U vs 580Mbps for C80.
Really depends on environment and sometimes even modem. BCM3390 and PUMA 7 based HW give me significantly different throughput results on a GT-AC2900 (Rebrand/updgraded AC86U), regardless of lan always pegging max speed.
PUMA7 is generally 100-200mbps slower with the same wireless control channel... I don't know why this is.
And like the AX86U, my GT-AC2900 also suffers from weaker 36-48 due to lower rated power output. My furthest client (AX201) has RNG speeds depending on time of day due to interference. Unii-3 149-161 helps, but thats also crowded here.
GT-AX6000 is rated for full power on both unii1+3. Plus its a Gen 2 platform... It's more or less the "real upgrade" from Wave 2 AC IMO.
I don't disagree though. Penetration on the AC86U is quite good, but it's starting to show its age in certain areas.
Anyway I just bought one today. Got it for $290 with $10 discover amazon promo. + 5% Cash back at end of billing cycle. I think this is the lowest possible price considering AX88U (gen 1 4x4+4x4) never really dropped below $250 according to camelcamelcamel.
I suggest anyone waiting for "AX86U PRO" to just go with this prime deal. MSRP/Pricing on regular gen1 AX86U is fairly stable $260-280... Zaku AX86U went for $220 a few months back, but that was sort of a one off deal that lasted 1-2 days.
I just don't see the AX86U PRO being priced below $300... Plus you get a better 2.4G radio + extra 2.5G port going with the GT-AX6000.