I know I am late to the party, but I have several Bare wetsuits, so I can provide some personal comparison. Keep in mind I am a cold person. I am ALWAYS the person with the most thermal protection. I also don't move much when I dive, so I don't keep warm from movement.
These are the ones I have (keep in mind these are the female model names):
3 mm Nixie Ultra (brand new, will use next week, "Ultra" has some Omnired lining, but kind of a joke)
5 mm Nixie (my most used suit, it has lived, and it's pretty much dead now)
5 mm Velocity
7 mm Evoke (Omnired thermo-reactive lining)
5 mm hooded vest (Omnired thermo-reactive lining)
COMFORT: The Nixie suits are my favorite because they are SUPER stretchy and VERY comfortable. The Evoke is a very thick suit, but it is also reasonably stretchy, fits me extremely well, and is also very comfortable. The Velocity is not very stretchy in comparison, and is not as comfortable. I hate the 5 mm vest because it's very claustrophobic, but warm!
WARMTH: The 7 mm Evoke (reactive) with the Waterproof 10 mm hood and the new version Aqualung Ergo boot (awesome boot btw) make a cold water dream team! I wear this combo when I'm diving water around 70F (20C). Colder than that and I will be in a drysuit.
The 5 mm Velocity is a bit warmer than the 5 mm Nixie, but I rarely use the Velocity because I don't like it. I'll wear these suits in water around 80F (27F). At 75F (24C) I'll add the 5 mm hooded vest. I also wear 5 mm in swimming pools with students.
I haven't used the 3 mm Nixie yet, but I bought it for an upcoming Indo trip because the 5 mm Nixie is worn out (too much time in the pool), I dislike the 5 mm Velocity, and I think the 7 mm Evoke will be too warm. I'm hoping I can layer the 3 mm and be warm enough because it would be really nice to only wear 3 mm.
WEAR: I think wear strength is probably directly related to ow stretchy the suit is. So the Velocity is the toughest suit. The Evoke is the anomaly in that it is quite stretchy, but much tougher than the Nixie. Be careful with the Evoke wrist and ankle seals though, they are delicate! The Nixies are not tough suits, but they are affordable and extremely comfortable. That makes up for it I think.
PACKING: Directly related to thickness. I can't compare same thickness, other brand though.
OVERALL: I would trade in every one of my wetsuits for Evoke suits. I LOVE the Evoke.