Generally the comparison between Tensil and any fixed ASIC is going to run along similar lines, which we explain in this comment regarding the Coral accelerator: https://news.ycombinator.com/item?id=30643520#30645318

The big difference is that while those fixed ASICs offer great performance on the set of models they were optimized for, there can be big limitations on their ability to implement other more custom models efficiently. Tensil offers the flexibility to solve that problem.