If the internals fascinate you, you can check out the teardowns in detail (here and here). In a gist, both watches can be taken apart quite easily, due to their use of T5 screws and the lack of adhesive. And both sport a small rubber gasket, which explains their IP67 rating. iFixit says the LG G Watch’s band is slightly more difficult to remove because it requires a traditional spring bar removal tool (or something small and flat like a blade to get into the tiny gap between the strap and the watch), which we disagree slightly. Since the watch comes with a flexible rubber strap, all you need to do is to squeeze it to pop out the pin. Of course, if you replace that with a stiffer strap, subsequent removal won’t be as easy.
Another thing worth noting is that a Bluetooth/Wi-Fi antenna is found in the Samsung Gear Live, and that’s because Wi-Fi support was never mentioned in the Gear Live’s specs. Who knows, maybe Samsung will enable some kind of Wi-Fi Direct feature in the future. That said, we recommend not reading too much into this little discovery.
At the end of the day, iFixit gave the LG G Watch and Samsung Gear Live a repair score of 9 and 8 (out of 10) respectively. Both have points deducted for a fused display assembly, which makes screen replacement expensive. The Gear Live also requires careful handling during repair due to several small adhered-in flexible PCBs.