Below I make an attempt at a rough classification of the different usages of the Sarati. There is some variation within each of these “valuations”, but the differences in comparison with samples of other valuations seem to be more significant. Nevertheless, some of these divisions are admittedly disputable. Valuation names in ‘inverted commas’ are new inventions. The rest are used by Tolkien.
The term valuation occurs in R12, where the table of characters is described as “the general valuation of the letters”. I prefer this term before mode: firstly, because mode is never used in the context of the Sarati; secondly, because there are important underlying differences between the Sarati valuations and the Tengwar modes. The most obvious difference is probably that the changes between valuations usually represent alterations over time, while the differences between Tengwar modes are adaptions that may coexist in the same time frame.
Characteristics: k-type 
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Sample language: English
Characteristics: k-type 
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Sample languages:
Samples: R9, R10, R11, R12, R13, R14, R16, R17b, R18, R19, R20, R21, RV1
(An adapted subset of the Phonetic Form)
Sample language: Quenya
Characteristics: k-type 
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Sample language: English
Characteristics: k-type 
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Sample language: English