The We-Vibe Salsa and Tango both have the same motors inside and the have the same battery life. The biggest difference you'll notice is what setting you're using them on. If you're using the Salsa on a lower setting and the Tango on a higher setting, obviously the Tango battery is going to drain faster. With both vibes fully charged and used on the same setting, they should last the same amount of time.

It should be the same. I think it has to do with how long they are charged.