Bitshares vs Bitcoin:
Bitshares is much faster than Bitcoin to conduct transactions.
Bitshares have the ability to buy market pegged assets. Not for Bitcoin.
The Bitshares assets fight the main problem of cryptocurrency: volatility. Example: if I buy 1bitUSD the value remains the same regardless of Bitcoin movement.
Bitshares is 2.0
The Bitshares protocol is much secure than Bitcoin protocol.
Bitshares is Ecosystem, Bitcoin is a currency.

OpenLedger vs other Exchange:
other Exchange are constantly under hacker attack, wallet are not secure, million of $ lost in the last few years (Mt.Gox, Bter, Crypsty....)
OpenLedger allows you to convert bitcoin to fiat-pegged SmartCoins instantly or by limit order. SmartCoins can be withdrawn directly to cash via NanoCard, PayPal, Ripple gateway or money transfer.
Wiring money in the legacy banking system takes days. OpenLedger let you send it anywhere in the world within seconds.
No one can freeze, seize, hack or attack your wealth. You are always in control and your identity can never be stolen.
You can spend your money instantly, anywhere major debit cards are accepted. We handle the conversions for you.
Your money goes directly from you to its destination, no middlemen ever get control of your money.
Only those you authorize can see your accounts.
Share control of accounts with friends, family, and business associates with complete accountability and flexibility never before available in legacy banking.

Sorry for my English guys...