One is the 20 kg size and suitable for quite a large vessel, the other is a 5kg size and would suit a small to medium sized boat.
The price is R8000 for the larger one and R2500 for the smaller one.
Please beware of imitations of which there are many.
I have used a Bruce anchor on all my yacht cruises and never had an issue with dragging once.
The anchor is possibly the most important part of your safety equipment when cruising.
Contact me for further details.