It's a Captain Obvious statement to say that calls will be priced higher because owning the stock has a larger carry cost.Actually, they won't.
http://www.nooptionantics.com/blog/?p=77
Look at the cost of ATM call vs. ATM put going out a year. Even a month or two, the calls will be priced higher. And as I mentioned above, I occasionally do that arbitrage whenever I have spare cash in my account that I don't think I will need for a while as my broker, IB, only pays 1.05% (currently) on cash sweep given current Fed Funds rate.
What's lacking from your superficial analysis is the dividend which depresses call premium and increases put premium.