"Both leak. The cap on the end is all that keeps a puddle from forming under the outlet."
I recently replaced both my tank valves, with the Valterra ones. Be very careful when installing these, or any other cable operated valves. There are certain clearances for the cable to operate correctly, and close all the way. Also, you will almost have to disassemble the valve body to install it on your unit. If not done right, it can crimp the seal, causing leakage. Don't ask me the details of how I know this, had to shower twice to get rid of the mess. Once you figure it out, it is pretty easy to install though. Just take your time.