The way this blog post works is as follows: click the links, both take you to a website. On that website is a power point presentation that you have to read really quickly in order to read all the verses in Matthew and all the verses in James in parallel columns. (or to click on continuously if you read faster than the presentation runs:) There are around 60 verses in each book that are similar.
James and the Sermon on the Mount The Epistle by James and Matthew 5–7 Virgil V. Porter, Jr. Bib Sac 163(2006): 347– ppt download: James and Sermon on the Mount James 2:13, For judgment will be merciless to one who has shown no mercy; mercy triumphs over judgment. Matthew 5:5, Blessed are the gentle, for they shall inherit the earth. Mat 5:7, Blessed are the merciful, for they shall receive mercy. Mat 6:14–15, For if you forgive others for their transgressions, your heavenly Father will also forgive you. But if you do not forgive others, then your Father will not forgive your transgressions. Mat 7:1–2, Do not judge so that you will not be judged. For in the way you judge, you will be judged; and by your standard of measure, it will be measured to you. more
Next we have this handout that I scanned and made into a jpg which is a three column spreadsheet where someone did the same thing that Virgil V Porter Jr Bib Sac 163 (2006) did in the above power point.