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Heidelberg Catechism — similarity of two editions
A: 3rd ed. 1563 (Heidelberg: Mayer)
B: Kleve: Sitzmann, 1774
| Similarity | 94 / 100 (weighted average: structure 20%, wording 70%, spelling 10%) |
|---|---|
| Structure | 100 |
| Wording | 93.5 |
| Spelling | 88.4 |
Word-by-word comparison → Read side by side
Structure: 100
The average of two figures:
- Units and order: 100. A has 132 units (questions, articles, rejections, and divisions such as Lord's Days, parts or heads), B has 132; 132 are in both.
- Form of the shared units: 100. A unit counts as having a different form when one edition's text is less than 80% of the length of the other's. All 129 shared units have the same form.
Wording: 93.5
The share of words the two editions have in common in the units present in both (7345 words in A, 7362 in B), weighted by length. Case, punctuation, Scripture references and spelling variants are ignored: old spellings are levelled before comparing (e.g. u/v, i/j/y, th/t, doubled letters), and long words that differ in only a letter or two count as the same word. This levelling is approximate, so a few spelling variants may still count as different words.
Units with the most different wording:
| Unit | Wording | Spelling |
|---|---|---|
| Q 40 | 83.9 | 92.3 |
| Q 16 | 84.6 | 92.4 |
| Q 85 | 85.1 | 83.1 |
| Q 33 | 85.3 | 81 |
| Q 87 | 86.1 | 77.9 |
| Q 5 | 86.5 | 87.5 |
| Q 17 | 86.6 | 79.3 |
| Q 50 | 86.6 | 89.7 |
| Q 15 | 86.7 | 94.2 |
| Q 47 | 87 | 83.8 |
| Q 116 | 87 | 86.3 |
| Q 20 | 87.1 | 90.7 |
Spelling: 88.4
Only the words that correspond in both editions count here (6876 pairs), so differences in wording do not lower this score. It is the average of two figures: 80.4% of these words are spelled identically (including capitals), and 96.4% are followed by the same punctuation.
Most frequent spelling differences (A → B):
Gott → GOtt (84×) · Gottes → GOttes (51×) · auß → aus (33×) · auff → auf (27×) · sein → seyn (22×) · sonder → sondern (20×) · wil → will (14×) · sonder → Sondern (12×) · Gebot → gebott (12×) · biß → bis (10×) · daß → das (9×) · Kelch → kelch (9×) · Creaturen → creaturen (8×) · opffer → opfer (8×) · seind → seynd (8×)
Units with the most spelling and punctuation differences: Q 3 (75), Q 68 (76.7), Q 25 (77.3), Q 87 (77.9), Q 17 (79.3), Q 91 (79.6), Q 33 (81), Q 121 (81.5). The word-by-word comparison ignores punctuation and capitals, so units that differ only in those do not appear there.
Computed 2026-11-06.