a good example would be the Star old glory which is very similar to the Star LCR Pr1 and Pr2 but now the funny part comes, the Pr2 got removed and the old Glory is litteraly an upgrade to the free counterpart the Star LCR Pr1
Or just compare the "Dog Ear" to their Obeya counterparts
Just aside from that you can buy an premium rocket launcher level up to demo rank 3 and get an OPGL and an OSMAW from there instea of leveling ur contacts up in order to get those weapons
Quick note: I know that you can still beat those enemys with skills but still they have an advantage and thats the fact ((once again p2w also means progressing faster with money))