Will there be a difference between red and white clover? There is in terms of feeding sheep and cattle. Red is good, high protein, but too much can behave like oestrogen and affect females hormonally - one farm I worked on, the untupped gimmers all put on big full udders on red clover! And we're told not to run cows on clover when we're wanting them bulled, as the oestrogen can behave like a contraceptive pill!
White clover, however, has little feed value, and its presence in the sward is indicative of low quality grass.
Lord Flynn, in what way is clover bad for horses? Except in that red clover indicates good quality feed, usually too high in protein for horses, especially natives.
I don't know whether there'd be a difference in flowering and non-flowering, whether the seeds may have different properties... hopefully someone who knows will be along shortly.