yes they are different.. both are more mild on sides than some harsher orals but still come with general oral steroid sides... anavar will be aimed more towards aesthetics, cutting and strength while tbol will add more size, good strength but wont be as aesthetically pleasing as anavar... i personally prefer anavar but it all depends on your goals... my goals coincide more with anavar but i do like tbol as well, just not nearly as much as anavar...