Question Re. Vented Gas Fireplace �Blowers� Vs. �Fans�

I have noticed that most Vented Gas Fireplaces use �blowers�, while some use �fans�, and many websites use the two terms interchangeable when referring to �blowers�. One website has a very interesting �fan� system which is used to easily switch out old blowers.

The current blower on my system is: http://www.efireplacestore.com/cui-bk.html while the website for the fan follows: http://www.qtfpsfan.com/ so as you can these are truly fans and not blowers.

Now my question is this: Has anyone used these types of �fans� and are they really �quieter� than �blowers� and just as effective? I am very interested in the �quiet� aspect of the fan as the (dead) blower that I am replacing was quite loud even on a low setting. The negative regarding the above �fans� is that they are more than twice the cost of my replacement �blower� should I go down that pathway. So basically I�m looking for feedback from any one who has used these types of �fans� vs. �blowers�. Are they really that much quieter? I guess I don�t want to umm blow it when it comes to this type of a cost differential�