Yes. The 310 only inspects a portion of encrypted traffic, while the 410 gives you full SSL inspection across every HTTPS session. If seeing inside all encrypted traffic matters for your policy, the 410 is the model where that becomes standard.

Up to 800 concurrent users at 150 to 250 Mbps of throughput. Once you're past that, the 610 roughly doubles both figures while keeping the same management console and filtering policy.

The 410 is sized to handle full SSL inspection at its rated 150 to 250 Mbps throughput without that being an add-on tax on performance. As long as your traffic stays within that range, decrypting and filtering HTTPS shouldn't be noticeable to end users.

Hot-swap RAID keeps the appliance running through a single drive failure, so content filtering and SSL inspection stay active while you swap in a replacement drive rather than dropping offline.

Yes, as a subscription add-on. It runs suspicious files through full system emulation in an isolated environment and checks them against Barracuda's global threat intelligence, catching ransomware and zero-day malware that category filtering alone would miss.