I've seen MikroTik router mentioned on HN quite few times, and have been wondering how is it better compared to say, Broadcom-based routers running OpenWRT/Toma

I've seen MikroTik router mentioned on HN quite few times, and have been wondering how is it better compared to say, Broadcom-based routers running OpenWRT/Tomato/DD-WRT. Could you clarify why? (I've looked at RB750GL, which looks very interesting considering its price, but still don't know how would compared to my current ASUS RT-N16+Tomato setup.)