Factom is different in a number of ways.  PoE hashes single files and records the hash into the Bitcoin Blockchain.  You could log many files if you wanted to, and only reveal the files you wish at a later date.  

PoE only hashes a single digital thing per Bitcoin transaction.  Factom combines many entries together and places a single hash into the Blockchain every 10 minutes.  Even if thousands or even millions of entries were placed into Factom, only the fixed entries are placed into Bitcoin.

Factom allows whatever data you like to be hashed and secured.  So the data entered and maintained by the Factom network is more flexible.

Factom is way cheaper. PoE charges 5 mBTC to log an entry (~$1.46 at the moment).  Factom would cost roughly ~$0.001 to record an entry.  That's because everyone using the system is "sharing" the Bitcoin entry.