I need help from the jewellery experts

I’m currently looking at this 18 ct gold bangle from goldsmiths:
https://www.goldsmiths.co.uk/Goldsmi…821/p/11070359

I also came across this one online from Harper Kendall:

https://www.harperkendall.com/products/18ct-yellow-gold-oval-tube-bangle?variant=42932469760245&country=GB&currency=GBP&gad_source=1&gclid=Cj0KCQjw7dm-BhCoARIsALFk4v91TSzfnUh2mQsLg2Yn9GAkMVBFURvfkbUM9Hw_Z39_vWMI_zpEQWUaAvBtEALw_wcB” target=”_blank”>http://<br />
https://www.harperken…UaAvBtEALw_wcB

To my untrained eye, they look the same. They have the same clasp, both 18 ct gold, both 4mm Oval Tube Bangle. As there is such a large price differential, there must be a bigger difference. I assume it would be weight, but, unfortunately, it’s not mentioned on either site. I don’t know much about the jewellery trade, so I dont know if two virtually identical items would likely have different weights.

I would appreciate some input from others. I don’t believe Harper Kendall could sell it at such a cheaper price than goldsmiths, so I do believe that goldsmiths one is worth more. Opinions from someone much more knowledgeable on the subject would be appreciated.