Well right now, at a weekly AM dividend of 0.02BTC/share, we have an equivalent hashing power of roughly 150MH/s, for 4.2BTC.

To compare AM value against BM value, based purely on hashing power:

BM: 0.084 BTC per MH/s  (9.3MH/s for 0.78BTC)
AM: 0.028 BTC per MH/s  (150MH/s for 4.2BTC)

Thus BM is 3x more expensive than AM, and AM has so much more to it than just hashing power.

BM is all about hashing power, yet with 12% dividends per annum, which may be maintained with luck, and a 3x higher than "market rate" value, I don't see how I would ever be comfortable with such a small profit/risk ratio.

And I don't see how I would ever be comfortable buying BM at 0.8 BTC per share, geez Louise...

But in all this I keep being the fool, by my own estimates, because this headstrong ego keeps wanting to be right instead of wanting to make money...