Man am I sick and tired of people on this forum shooting their mouthes off about nonsense when it is CLEARLY very easy to realize that you are incorrect.

+1 to whoever said that to this chap also.

As an example, lets look at the Bell Sweep R vs. the Venture.

Bell Sweep R features.
Fusion In-Mold Microshell.
In-mold Bottom Wrap.
Clear GPS Fit System.
Internal Reinforcement.
Channeled Ventilation.
Cam Lock Levers.
Registered Graphics.

Bell Venture features.
Fusion In-Mold Microshell.
ErgoDial.
Sanp In Visor.
Cam-Lock Levers.
PinchGuard Buckle.

Features that are relevantly available on the Sweep R but NOT on the Venture.
You can read all of these on their site Im not quoting the entire thing.

1. In-Mold Bottom Wrap. this is designed to bond microshell material to the lower part of the helmet which is typically exposed and therefore... less durable.

2. Internal Reinforcement. This is a composite skeleton running through the core of the helmet. It allows helmets to have larger gaps for ventilation. When you say more expensive helmets are less safe because they aren't "as round" or because they have "more vents" you are incorrect due to this.

3. Registered Graphics. This is probably the top feature that one should consider when looking for a helmet. You don't want to get pulled over by the copyright police and have to goto jail for wearing a helmet with non-registered graphics. Thats copyright infringement.

Do a search. We already played the "more expensive helmets are better because" game.