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Thanks for your comment.  I don't get much feedback about my translations.  I think the problem you have identified may be something other than a translation problem.  I have simply done a literal translation of the German text.  The comparison is with classification type A.  An R class loco will have been engineered to be able to go around corners faster than its A class equivalent.  So, eg, an Re 6/6 (bogie type Bo-Bo-Bo) loco will have a higher maximum cornering speed than an Ae 6/6 (bogie type Co-Co - less flexible).  The difference is particularly important on the Gotthardbahn, which is a very busy line with sharp curves.  This point is not made very clearly in the de.wiki article, perhaps because German speakers are likely to be much more familiar than English speakers with the Gotthardbahn.  Also, the first table in both articles is not as clear as the second table.  I would be happy to alter the first table in the en.wiki article a bit if you think that's appropriate.  Also, the word ""higher"" may be a less confusing word to use than ""increased"", even though the two words have slightly different meanings, and the latter is a more correct translation.   "