RE: .22 LR---------Marlin Model 60 or Mossberg 720 Plinkster?
Your still saying confusing things. The 10/22 is not a style of .22 long rifle. It is actually a model number made by Ruger. The Ruger 10/22. Both of the guns you mentioned are not even of the same design as a Ruger 10/22. The only thing they have in common is they are semi auto 22's.
You are either going to get a 10/22 made by ruger, a marlin model 60 or a mossberg plinkster. Not a marlin model 60 10/22 type rifle, there is no such thing.
They are all models of 22 rimfire guns made by different companies.
I would suggest the Marlin model 60 for casual shooting and hunting and the ruger 10/22 if you intend on target shooting or tricking out the gun. You can do almost anything to a 10/22 if you want to.
I don't know much about the mossberg, but if they are in the price range I would personally pick the marlin simply because I have owned them and know they work well.
Paul