13.56mhz hfss

Hello,
I'm a newbie ...

We are benchmarking EM software for applications mainly at 13.56MHz.
I think it's better to choose a frequency domain EM software for these low frequencies.
HFSS seems to be good for that but what do you think of the frequecy domain solver of CST?
Its interface is more friendly but what are its performance vs HFSS in this domain?

Thanks a lot for your answers