I recon the first one is a kit, ZX-5 SP, from the states, possibly the same as you would buy as a "SP" kit anywhere (with the latest parts but no oneway's), the second one is the RTR, original ZX-5 sold as a "ready to run" with motor, reciever & transmitter, may need some hop up parts. (there are posts on here that cover the RTR - great starter value)
As a note, I dont recon that this
http://cgi.ebay.co.uk/Kyosho-Lazer-Z...QQcmdZViewItem is an "SP" but is the same "RTR" set, its described as a SP in the title, possibly a mistake, these things being such a niech market - even the sellers are not sure what they are.
