Now you are making me go DEEP into my memory banks...Okay, the original RVP series had a 'Plaid' insert. RVP2 (2nd generation) was switched to a iridescent insert that has UV properties. The nose is bright orange and the belly either has a glow stripe from from to back about 1" wide or a chartreuse stripe (less common).
As for using them deep. I had tremendous success with them last summer fishing at times 300' in Campbell River. I'm also less concerned with matching the baitfish to the size of the plug. IMO they create/entice reaction bites. All or most of those fish that are down south at some point eat big herring. Last summer in CR I caught many salmon that had 10"+ herring in their belly. It's not like it's a foreign entity to them. I prefer Tubby's over the classics...
WW