Christian heaven: your wife and loved ones will be waiting for you where you can spend an eternity together without being weighed down by the sinful wants of mortal flesh. You know what? Your dogs, cats, and other loyal companions will be there there too because who would ever want to spend eternity without their best friend by their side?!
Islamic heaven: so anyway here's a bunch of random women conjured up by Allah purely to sexually satisfy you. Also dogs and other lesser creatures do not have souls and are unclean so they are not permitted into heaven.
My opinion of other faiths lowers the more I learn about/analyze any of them.