Leaves the same, growth habit the same and the same flowers? If so it sounds as if the main thrust of your question is answered. However, as regards the following.................
[quote="ricelg" However, is there any reason to think that Salvias are more or less likely to come true through seed?
Thanks,
Larry[/quote]
Yes, there is. Salvia are rather promiscuous (Wendys Wish being a very popular plants that occured naturally in the garden of an Australian Salvia collector) and as such there can be cross pollination or reversion in Salvia seed. The Chinese Salvia are especially likely to cross pollinate.