In The Bible, what does Paul say about himself to distingish himself from the false apostles?

One of the many passages in the New Testament where Paul
talks about this theme is 2 Corinthians 11, and I have included a link below to a site
which gives a more in depth discussion of this chapter. However, note that in this
chapter Paul talks rather dismissively of Paul apostles and distinguishes himself from
them in a number of different ways. Note how he describes them in verses 13-15 and the
harsh words that he uses:

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For such men are false apostles, deceitful
workmen, masquerading as apostles of Christ. And now, for Satan himself masquerades as
an angel of light. It is not surprising, then, if his servants masquerade as servants of
righteousness. Their end will be what their actions
deserve.

In contrast to these
harsh words, Paul argues that he is different from them in a number of key ways. In fact
this whole chapter is included in this book to prove Paul's legitimate status as a true
apostle. He refused payment for his services, unlike others. For him it was always a
principle to never be a burden on anyone, as it says in verses 7-12. In addition, Paul
goes on for some length about the various sufferings he has endured to preach the
Gospel, sufferings that are severe and serious but also show that he cannot be a false
apostle, for what apostle would endure such hardships if they were false? Lastly, Paul
boasts, but boasts in his weakness, as it says in verse 30. He does this again to add
veracity to his claims of being a true apostle.