I have never heard of both of them, with that, i wouldnt use them, i have had my fair share of Scams...... im not calling these sites scams, im just saying there are better.......

Although i prefer PMDG for 747, 737, and MD-11, Level-D for my 767, and Eaglesoft for my GA Craft, a site called, Wilco/Feelthere is the best choice for a CRJ/ERJ class aircraft..... They have full FADEC, FMS, AP, and full glass cockpits..... Check it out....

Hope that helps....