Full Idea
What distinguishes transcendental idealism from speculative idealism is the fact that the former does not posit the existence of the transcendental subject apart from its bodily individuation.
Gist of Idea
Unlike speculative idealism, transcendental idealism assumes the mind is embodied
Source
Quentin Meillassoux (After Finitude; the necessity of contingency [2006], 1)
Book Reference
Meillassoux: 'After Finitude: the necessity of contingency', ed/tr. Brassier,R [Bloomsbury 2008], p.25
A Reaction
These modern French philosophers explain things so much more clearly than the English! The 'speculative' version is seen in Berkeley. On p.17 he says transcendental idealism is 'civilised', and speculative idealism is 'uncouth'.