This is a very good question. Unfortunately, the canon sources really do not give us much to work with in assessing the potential limits of cognition in LBT dinosaurs, and the actual grammar of their languages. Though I suspect some concepts might be easier for one language to convey than the other, I think that both languages could express most concepts with the right word and grammatical constructions.
My personal head-canon, which I have included in my Seven Hunters trilogy, is that the leaf-eater language is simpler in terms of grammar, without an emphasis on grammatical case, whereas the sharptooth language makes extensive use of such cases. So, for example, a slightly different word form would be used for an outsider versus a pack member. I also imagine the sharptooth language to have several word forms for polite, formal, informal, and threat - which would help to clarify one's intent in speech which is important with species that are capable of extreme violence. As for numbers, I have hand-waved this, for the most part. Though I do depict in Mender's Tale that fastrunners have a tendency to count in intervals of twenty (63 would literally be 'three twenty and three') as a sign that a prototypical numerical system is developing at least in the spoken form.