system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What is the difference between a good lawyer and the "best lawyers money can get you" while defending you in a case?
gpt
To put it simply as thus: 

A good lawyer works within the law to get you the best result possible. They work with the system, and don't break the rules, and so are good all round. 

The best lawyer money can buy, however, is one who knows when, where, and how the rules can be bent. They know how far the rules can be bent, and which rules can be bent in which situation. And thus, they are able to get a much more favourable outcome that the good lawyer can provide, albeit at a high cost. 

In addition to this, the best laywers are very specialised in what they do. A top end laywer who defends you in a murder case, for example, may have spent their entire career studying the criminal laws for murder, and cases where the rules have been bent, both successfully and unsuccessfully, and what results came out of it. If you hired this lawyer then, to defend a libel case, or a common dispute, they wouldn't be as good as a different top end laywer who has studied these cases. 

Think of it like surgeons. Most surgeons are good all round, and they can deal with most types of surgery, with no issues. But for specific and technical surgeries, like organ transplantation, brain surgery, or reconstructive surgery, a regular surgeon is not going to cut it, and you need to hire a specialist to get the job done the best. 

EDIT: Further clarification.