Stack Overflow question How and/or why is merging in Git better than in SVN? is a great question with some great answers. However none of them show
I don't have concrete examples, but any kind of repeated merge is difficult, in particular so called criss-cross merge.
a
/ \
b1 c1
|\ /|
| X |
|/ \|
b2 c2
merging b2 and c2
The wiki page on Subversion Wiki describing differences between mergeinfo based assymetric Subversion merge (with 'sync' and 'reintegrate' directions) and merge tracking based symmetric merge in DVCS has a section "Symmetric Merge with Criss-Cross Merge"