Like I said in my post I haven't tried the vest but a lot of guys I dive have them and love them -- it's also much cheaper than the LM heated shirt.
So for full disclosure I've been diving with the guy who started bringing Trojan over from the EU for some time -- I don't receive compensation for reviews, etc.
Anyways -- the things I like about the Trojan canister:
- for the same capacity it's more compact than the LM one.
- it has a power regulator much like the LM Pitkin controller (I put LM and Trojan as tied here)
- where the entire top of the LM canister opens, the Trojan one stays sealed and only has a port opening to plug in the charger
- overall I get the impression the Trojan canister is of much higher build quality
When I bought my canister I picked it up in person and had him change the E/O cord on my LM canister, The inside of LM canister seems very "garage built" while the Trojan appears to be more professional engineered. Trojan seems to be using higher quality parts as well -- for example the LM cable gland is plastic and super cheap, while the Trojan uses a very nice stainless steel cable gland.
My overall impression is that Trojan provides a much higher quality product and at a lower price point too.