"10% more" can mean alot of things
if the module as a whole got 10% more then it could be because a single thread got stronger, or the second thread is getting 90% instead of 70% gains thus turning a module into 190% instead of 170% which is ~10%.
or it could just be a few % IPC and a few % clock rates

i honestly hope single threaded perf got 10% better IPC, without any sacrifice in clock rates (and maybe like 5% more OC room too just cause the process is more mature)