the gun in question was a weihrauch hw35, secong hand. I also had my eye on the BSA lightning.
I owned a Weihrauch HW35 for over ten years, they're a very good rifle, lighter in weight than the HW80 which makes it nicer to carry for longer periods.
Don't worry about accuracy of the rifle, you'll probably find that it's accuracy is better than yours.
Learn to shoot with a springer, it'll teach you a lot more than learning with PCP. You will become more aware that you probably won't get a chance at a follow up shot so you will be more carefull with your shot placement. You will probably wish to stalk closer as well, so as to get a cleaner shot.
None of these are bad things, just be aware you only need to be so far away and don't try to overcook it.
I now have two air-arms rifles, the first a springer (Air Arms Pro-Sport) and the second a PCP (S410TDR), both are very accurate and both have enough power for taking bunnies.
If your stability and hold of the rifle is good then you'll find that your accuracy will be good as well.
If your friend says that he can group better with a PCP he should be informed that's because he doesn't have to change position every time he cocks the rifle.
It's harder to group with a spring gun than with a PCP because you have to change your postion every time you cock the rifle. You may change eye relief, shoulder position, position of your elbows, grip on the pistol grip and any number of factors. If you group well with a springer then fair play to you.
When hunting you are more likely to be firing one shot from one position, grouping doesn't come into it. It's the initial accuracy of the first shot fired and spring guns are just as good at that as PCP's are.