Laser seems to be the most breathing out of the 4.
Does catlike get any air inside?
But it's for TT so you won't be concerned with ventelation much.
The Lazer is essentially unvented when the shell is on it. I think the back is open.
The Catlike probably doesn't get much air. The holes in front are more for sunglasses than venting. The US version doesn't have vents at all.
I need a new helmet since mine is several years old. Lazer looks like it would be a decent all around helmet. They have an integrated hat, the removable aero/rain shell, and even have sunglasses that clip to the helmet straps. Added aero/warmth is part of my goal. My old team issued Louis Garneau is fine, but one thing that bugs me is the helmet ridge is cut a little low and I can't see as much when riding with my head down. The Lazer also basically allows me to bring one helmet if I'm traveling and doing a Merckx time trial.