well krakens are very good guns once you tinker but don't expect it to last more than a year of gaming unless you "tinker" the gun
JG is a great company as your also forgetting "Echo1" "Rebranded JG" so your friends gun should be fairly decent "Depending on the year"
You can target practise and if you decide to play then you can play with less mods compared to ur standard Kraken.
If you like Aks get the Kraken if you like G36's then go for it.
There both good starting choices but realy its what YOU want