Peavey 5150 vs 5150 ll???

5150 is more or less similar to the 6505 which only has 2 channel of lead and rhythm (something similar to this) there is no clean channel except by rolling ur guitar volume down on the rhythm channel meanwhile the 5150 II is similar to 6505 Plus where u have a lead channel and clean channel if i remember correctly i prefer the 5150 II or 6505 Plus becos i use the clean channel a lot and for lead i just use the lead channel and boost with a Boss SD-1 pedal but anyway u need to try out both of them to see the diff becos i could be wrong it's been a while since i go and test all the amps in music stores too busy lately.