Mick,
I'm unfamiliar with the other product you mentioned.
As for the catastrophic trauma kit, I have that, too. Once again, never had to use one (thank God), but I have opened one of everything in the kit for use as training aids, and am pleased with the quality of the products. Good products, good value. If have your own vacuum sealing machine, or don't mind the extra volume of a large zip-lock bag, the individual products in the kit can be purchased individually at a decent savings vs. the assembled kit.
For the record, I have no financial ties to the company; I'm just a very satisfied customer.
Take care,
Andy