- The biggest relevant difference -- which he mentions -- is indeed value types, which are coming to Java,

- The CLR doesn't have coroutines. Yield/await are what's known as "stackless coroutines" and are, AFAIK, implemented at the language level (and besides, stackless coroutines are a far cry from coroutines, as the most powerful concept of coroutines is the stack). The JVM, OTOH, offers such sophisticated bytecode manipulation capabilities that full coroutines can be implemented as a library (e.g. Quasar).

- What he says of bytecode/package design bears absolutely no relevance to the quality -- or power -- of the VM. Those are just simple design tradeoffs with little effect on results.

Also, see my reply to math.