Most of the time, Dementia and Alzheimer are considered similar however it is definitely not the same. Dementia refers to the symptoms that generally can be seen due to memory declining, thinking abilities and reasoning. There are types of dementia which generally can be witnessed due to brain cell damage.  On the other hand, Alzheimer’s is a degenerative brain disease which is the result of complex changes in the brain after the cell damage which results in impairment in cognitive functioning and memory.