I am not a copywriter but I've worked doing a lot of websites for larger companies and this is the kind of spiel that they would use to limit their liability wh

I am not a copywriter but I've worked doing a lot of websites for larger companies and this is the kind of spiel that they would use to limit their liability when discussing their products. Present your product in the best possible light without lying about it. If there are stark measurable differences between you and a competitor and you can record and validate them, (i.e., DataGridXL can parse this common operation on 100,000 table rows in X seconds, which is Y% faster than HandsonTable on the same machine!), that is perfectly fine. (Use OBS Studio to video the results and save it, and should they take you to court you can use it to prove that you did not lie one Jot or one Iota.) It's only Libel if it is false, so if you know it is not false and can prove it, then you're in the clear, but smack talk can and will get you smacked down in court. Also, it might be a good idea to also compare your software to a third product if you can find one that you also outclass. That shows a touch of impartiality so that it doesn't read as if you're picking on HandsonTable. If not, that's ok, but it's an idea worth considering.