Regarding the specs I am sure it will work, The operating frequency goes from 50Hz going up. 50Hz is the normal PPM frequency.

That other topic was about a special tail servo that only works with a compatable gyro and regarding those specs it will probably work with the Sanwa superspeed mode.

If you want an affordable brushless servo, I did found this:
HJ HDKJ D3020 Full Metal 20KG Torque 180° Rotating Brushless Motor Kit - Free Shipping - DealExtreme