I have a few Screams at home - some with hard earflaps, some soft. The soft earflaps didn;t work too well, and I had to finagle a ear covering underneath as the earcovers wouldn't stay tight enough to keep my ears warm.
The hard ear cover version was fine, but I found my hearing was somewhat compromised.
The Scream was the most successful helmet I've ever had in terms of ventilation, as it would vent almost all the heat while staying waterproof. Most of the helmets you mention have huge holes in the top which are fine, but if it's snowing or raining and you open them, you get a wet cold head in no time.
The scream was never the most comfortable helmet ever made either, with a rather rudimentary cushioning system inside.
I now have a Giro Omen, and think it's a far step up from the Leedom's, which were great for their time (the Scream's about 6-7 years old).