There is only one pump on the 2262--if it breaks, the tank is stagnant until I get home.
The hose connections are nowhere near as robust as the hard PVC pipe under my 540.
A leak in the canister could siphon most of 125 gallons of water out of the tank.
I think the 2262 is reliable. But, it's not as robust, not as well designed as the sump. Also, the 125 is a glass tank.