The Cisco WAP581 APs will have more future than the old Ruckus units since it is a new design and an AC wave 2 4x4 unit.
Cisco seems to support most small biz gear 6 or 7 years, Ruckus 4 to 5, so that's true. But old Cisco is the same as old Ruckus; they're both designed off the same base 802.11 amendments. Small biz WAPs are still commodity RF design, per
581 photos. Nothing unique; you'll find the same stuff in a UniFi, Grandstream or TP-Link AP. Contrast that with a comparable
Ruckus R710. CNC machined multi-axis antennas, custom-design daughterboards, etc. all work together to yield better RF sensitivity and selectivity and interference mitigation. It is a better mouse trap, but then again you're comparing an SMB product to an enterprise one, so it's really an apples to oranges comparison. The more fair comparison would be Cisco Aironet, but unfortunately the cost and licensing for it even makes Ruckus look cheap, so I find Ruckus to be the best of both worlds.
I would also think the Cisco WAP581 AP would be simpler to setup than the Ruckus using VLANs and clusters. The Cisco WAP581 APs are so simple.
Here's a video of the
Cisco WAP setup and one of
Ruckus Unleashed. To me, Ruckus is easier hands down, but to each their own. Plus it's an actual true controller-based management plane, whereas WAP is just using neighborhood discovery to push static config changes, and lacks anything beyond that. Not the biggest deal in the world for a simpler home or small office config (for which it's designed). Again, not really a fair comparison, as the better product to compare with is Aironet, which has a separate control plane.
Nice! Can I mix and match? Like adding a R510 on the same network? Or possibly Wi-fi 6 or will I need to replace everything? Does the Cisco WAP581 AP require a control or are they like the Ruckus and can run Unleashed?
Yep, you can mix and match any/all models as long as there's a release of Unleashed that supports all models in your setup. I'd err on the side of newer AC Wave 2 stuff, though.
The Cisco WAP581 APs can not be run with a separate controller. Cisco has enterprise level gear for really large networks. The Cisco WAP581 APs have the controller software built in for up to 16 APs. If the master controller goes down the cluster automatically promotes another AP to be master. In your words the Cisco WAP581 AP already has unleashed built-in. No reason to re-flash firmware.
Indeed, WAPs are great for smaller deployments of same-subnet, more static and smaller type setups. They don't have the scale capabilities built in like Ruckus, though, and again Aironet is a better and more fair comparison there.
Even with weaker interference mitigation and airspace tuning, the 581 is still a solid value at ~$250 ish street price brand new. For that many spatial streams you're have to do all R710's or higher. So it could very well be the better buy for the OP in this case.