Witch Telescope Should I Buy From These 2

The Intelliscope is completely unsuited to astrophotography since it lacks tracking, so if that is a principal consideration your choice between the two is made. Personally based on your stated criteria I wouldn't go for either scope - there are some much better options within your budget if you buy tube and mount separately.

I'll concur with Geoff's comments about a Dobsonian mount telescope... excellent for visual work. I built a 10" Dob about 10 years ago, and found it quite usable for visual work, but a bit of nuisance as you have to push and pull the scope to follow the path of the star or planet across the sky.

This is readily compensated for, however, by the addition of an Equatorial Platform, which is simply a platform that very slowly rotates at the right rate to compensate for the Earth's own rotation.

I built one of these, which makes my Dobsonian telescope much more user friendly, especially when inviting a group to view the heavens. A well made equatorial platform will follow heavenly objects for over an hour at a time. If carefully aligned (but any equatorial drive system has to be carefully aligned) it will permit a series of exposures that can be "stacked" readily. Equatorial platform pictures don't need the field de-rotation complexity, either.

Astrophotography (AP) has its own, very steep learning curve.

First off, you need a telescope mount that can handle the requirements of tracking and slewing the telescope, while allowing you to do a tight polar alignment and hold the weight of the telescope, camera and whatever else you have bolted to the scope.

Neither of the dobs have that ability. They are alt-az mounted scopes. The Celestron would work, since it does have an EQ mount and can be remotely controlled by an autoguider system (more that is a second).

What happens with alt-az mounts and AP is a thing called field rotation. This effect makes the field of view rotate over time (greater than about 20 to 30 seconds), ruining the shot -