Below photo shows the difference the main difference is the spring size i.e resistance. the original has a bigger spring, now on a door that shuts a normal way I don't think it would be an issue but with the added angle I think its making it tougher. as well as this the new ones have a better grip on the striker with less chance of rattling around.
I have to make a small alteration to them and then that piece of work will be complete.
In the meantime I've done a walk around of the car talking about parts as some people wanted to know what was going on with the car and how it currently looked...roll on the bodyshop!