the wrt3200 has more "horsepower" without a doubt, the r7800 couldn't run more then ~200Mb/sec with cake running whereas wrt3200 could do ~300Mb/sec with layercake and still have plenty of cpu cycles left for other stuff running.
but with the aswifidude (nss) build the r7800 also easily can handla my bandwidht
fun boxes,,why havent i played with them for years ;)?
The x86 offers the best performance. With the 4 core processor in that thin client you could run circles around the other two devices. With 300/300 internet any of the three devices will work.
I’d run the newer 21.02. Two additional years of development is a huge leap forward.
i have tried most of the ones that are available for the r7800 or wrt3200
davids was a really nice on, last i tested was stock 21.02 and build it up to where i wanted it (firewall rules/portforward,dyndns,scripts,vlan etc etc) but i got some wierd disconnects with all interfaces just going "down" (4times in 24h), nothing wrong on my vlan switch atleast according to the logs.
basically lost motivation there and just started my qotom box with opnsense installed on it.
so to answer your question i´m not running any openwrt atm.
I'm running the final davidc502 with about 4 month uptime on my WRT32X, it's been flawless. Now that 21.02 snapshots are up for this router I'm going to try one very soon and will report back here when I do.