For example, in TRIE-NOEMPTIES the low-span saturation is lower than in TRIE-NOTRANSFORM since short spans in the former case can match only signatures which have both d and o small, while in the latter only d needs to be small.
the several hundred states which are reachable only via categories all match every span starting from size 0 for NOTRANSFORM, but are accessed only gradually for NOEMPTIES.