Comment 6 for bug 1655483

See also:
Changes wrt line spacing in Inkscape 0.92 are described here:
http://wiki.inkscape.org/wiki/index.php/Release_notes/0.92#Line_Spacing
http://wiki.inkscape.org/wiki/index.php/Release_notes/0.92#Known_Issues

Earlier related reports:
Bug #1655483 “Inkscape 0.92 line space problem with text of Inkscape 0.91”
Bug #1655412 “Space between base lines misbehavior”
Bug #1652006 “Line spacing differs between 0.91 an 0.92b4”
Bug #1644299 “text and image not displaying in 0.92pre3”
Bug #1642133 “Inkscape shows text with ridiculously wide line spacing”
Bug #1617692 “Spacing Between Baselines Messed Up 0.92 15081”
Bug #1556400 “line height all equal in development version”

And:
Bug #1652340 “Extension for 0.92.x to fix line spacing in legacy documents”
The proposed extension (for 0.92.1) can help with many basic cases where multi-line text in legacy documents renders differently in Inkscape 0.92. In your test case, the outer style of the two text objects differs, and thus the result for the re-adjusted text on the left will still show a slight difference in the baseline spacing compared to the text on the right (the extension does not copy style properties from random other text objects; it only shuffles the style properties per text object).

Internally, the extension basically applies the same steps you likely read about based on the bug description (setting line height explicitly for all inner text elements, and setting it to 0 for the outer text, which defines the CSS "strut" value). These steps also work for your test case when done manually (using the options on the text tool controls bar).