Unless I am mistaken, Sierra +1 and Sonora +1 are identical.
Are there any more “identical twins” in the catalogue?
Hey @ivegotabike,
You might come across this from time to time and there is a reason for it, so don’t worry too much. These workouts shouldn’t ever conflict with each other. They’re used in different scenarios. 
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There was never any danger of me worrying about it at all, let alone too much! 
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Sierra +2 is an assortment of suprathreshold efforts consisting of 2x7 minutes at 105% FTP, 2x5 minutes at 108% FTP, 2x3 minutes at 115% FTP and 2x2 minutes at 121% FTP. Recoveries between intervals are a scant 2 minutes long.
Sonora +3 is an extended assortment of suprathreshold efforts consisting of 2x7 minutes at 105% FTP, 2x5 minutes at 108% FTP, 2x3 minutes at 115% FTP and 2x2 minutes at 121% FTP. Recoveries between intervals are 2 minutes long.
Is this another pair of identical twins? Well no, not quite. Sonora +3 is VO2 Max 8.7 / 105 TSS, but Sierra +2 is VO2 Max 9.0 / 106 TSS
The “all rides” tab shows no rides for Sonora +3.