Thanks for your input and I totally understand your instructions regarding two separate projects.  The next question I would have if you could answer would be concerning the product Crazy Animation/er 2 Standard edition.  I believe this product can do two heads at once.  Will it do entire photos?  or are characters required?  The other question is more specific with any of the two products, Crazy Talk 7 and CTA2 Standard...it pertains to eyes.  Turtles have eyes on the sides of their heads.  Mammals have them in the front of their head.  Could eye movement be attempted with much work, or not?

Thanks in advance for your assistance in helping me decide which of the two products to purchase

Yes and no.  Yes, CrazyTalk is the application to use to transform a photograph into a talking character.  However, with that said there are quite a few caveats.  One of which is the position or pose the turtle (aka character) is in. Typically the character should be fully facing the camera.  This is not a hard & fast rule, it really depends on the photograph in question. And secondly, CrazyTalk 7 can only do a single head or character at a time.  With some creative editing in post production you could make it work, but it will require significant effort on your part in a video editor or compositor to get both of the heads talking.

What I would do is make 2 separate projects, one for each head. Have your audio recording with both side of the conversation between the heads, and in CT animating the appropriate head during the appropriate pieces of the conversation, making use of both the Talking feature, as well as the Listen feature. Then do the 2nd head, reversing the times talking & listening for the second head.  

Take both clips into an editor and with some good masking and audio syncing you should be able to make it look like the two heads are talking to each other.  Simple enough to describe, not so simple to actually do without some real effort though.

I hope I am posting here in the correct forum.  I am searching for the proper Real Illusion product that will animate a talking photo of my two-headed turtle.  Will Crazy Talk 7 do the trick, or will I have to use another product, and if so, which product will suffice.  Thanks