I assume less weak based on the rating... "25mm of hardened steel cable" sounds chunky (and possibly heavy).
Are those locks pretty weak? Aren't they just a wire, with metal caps and over that some plastic topping?
This might be a bit more secure as Sold Secure Silver rated, from Millets: https://www.millets.co.uk/activities/143923-suire-locks-mako-combi-ad251200-bike-lock.html £24.70 including £4 delivery using NEW10 code - might be cheaper on their ebay shop?
Robbing gits will still get ya bike