Id forget the 2 you have posted mate.
They are not the best quality rifles, and if you ever decide to get into the sport more seriously than just the back yard plinking you talked about they will have their floors and you will have to buy again.
The best advice that I can give you is get a good condition but second hand Weihrauch HW95 in .177 or .22.
This rifle will excel at anything that you can throw at it from tin cans in the garden to metal targets to (when your up to it and if practised enough) you do later decide to hunt with it, 50 yard rabbits.
Si.