Even though English VA Spike (and English Bebop in general) is often cited as Anime Dubs Done Right, I still prefer the Japanese spike. He sounds sleepy, only half-paying-attention-cool, whereas English Spike felt a bit too I Know I'm Cool (and therefore less cool).
But both are good, and John Cho isn't
(only seen first episode, mind). Faye Live Action seemed different but decent in her own way (once again for me the Japanese Anime Faye is my fave as she sounds younger and slightly more petulant than the older, sultry voice in English anime dub). Live Action Jet was pretty good in vibe and huff-and-puff-ness but the direction and dialogue doesn't get the most out of his performance.
The original Japanese VAs are doing the dub for the live action and I was excited to try the experiment of their voices in the new show, but Japanese language isn't available in the UK.
Though, typing this I've just realised I can probably just use a VPN to try it... Whoops!