Alloy S40 40cuf stage tanks - luxfer or Catalina?

[triode12]

Hi all,
Which brand of S40 cuf (5.7l) tank would you recommend to use as a bailout?
I've heard that the Catalinas are less buoyant and act like a steel tank when empty while the Luxfers are more buoyant when empty. The Luxfers are supposed to be "better" in that they do not change your bouyancy/trim when you unclip them as they do not add significantly to your weight.
I can get either brand of tank for the same price and would like hear from more experienced hands on this matter.
Thanks

 

[decompression]

Yup, the luxfers are more sought after due to better characteristics and that's why you'll find lots Catalina's on Craigslist.