Interestingly the Seeed one says BW16 which I bet is the successor to the RTL8710 BW12 http://www.ai-thinker.com/pro_view-13.html
AiThinker actually seem like a pretty decent company, and I bet it's way cheaper buying from them than via Seeed
edit: but yes, there seems no reason it couldn't run Espruino natively. It might be quite a good new platform to look at
@Gordon started
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
Interestingly the Seeed one says BW16 which I bet is the successor to the RTL8710 BW12 http://www.ai-thinker.com/pro_view-13.html
AiThinker actually seem like a pretty decent company, and I bet it's way cheaper buying from them than via Seeed
edit: but yes, there seems no reason it couldn't run Espruino natively. It might be quite a good new platform to look at