Polylactic acid is polylactic acid. It has known properties. I don't know what Colorfabb's PLA-HP filament is actually made of, but it obviously isn't PLA; it'

Polylactic acid is polylactic acid. It has known properties. I don't know what Colorfabb's PLA-HP filament is actually made of, but it obviously isn't PLA; it's almost certainly some kind of proprietary (and therefore non-recyclable) co-polymer. "Bio-based" is a very different claim to "biodegradable".