I just bought a C410. It's a good one and has a bit more features than C210 that i got a week earlier. However, I noticed a significant difference in reconnecting to Wi-Fi. The test is like this: Turn off the Wi-Fi (I use my phone's hotspot for W-Fi). After a while turn it on again. Results: the C210 takes 3 - 7 seconds to reconnect to the Wi-Fi, while the C410 takes 30 - 50 seconds! The two cameras are side-by-side, and are very close to my phone (therefore there is no Wi-Fi signal issue). The time is measured when the blinking red light stops.

Although this is not a big problem, the C410 development team may want to look into why C210 can do a much faster reconnection and eventually improve C410.