Does Nintendo 3DS Use the Same Wi-Fi as DS/DSi? No—Newer Standard

No. 3DS supports a newer Wi-Fi standard:

• DS / DSi: 802.11b/g (max ~54 Mbps).
• 3DS: 802.11b/g/n (max ~72 Mbps, better range/stability).

The 3DS can connect to b/g networks, but also benefits from n routers for faster downloads and smoother online play.