Starlite, I use Retin-A and I love it as I have super oily skin. The only downside is that with usage, the skin may become easily irritated and dry causing extreme (well maybe not "extreme") peeling. More than anything, the peeling is a nuisance if you like to wear make-up everyday. Because my skin is oily, if I use a heavy moisturizer to combat the peeling and dryness, I'll end up looking like an oilslick. However, if I do break-out I don't have to worry with scarring or spotting because the Retin-A constantly exfoliates the skin or causes it to peel more frequently. I have not tried Tazorac but I'll ask my Derm about it at my next appointment.
Hope I've helped in some way!