Jasper are not the same as the S at all the Jasper has a GPU and CPU and the S has a combined GPU and CPU with a vastly different layout. The reliability though is as you say, better on both models then the previous design.
That so?
Either way, I've had my Jasper in a cupboard for 2 years and it's been rock solid, so I can't think of any reason to avoid a Jasper.