different AAS at different doses will suppress you quicker than others absolutely.
you can test this theory yourself by running A. AAS then testing your LH after say 2 weeks.. and running B. AAS and testing your LH after 2 weeks.
also this can be compounded by how long its been since you ran a cycle. and other factors as well.
generally most AAS will start suppressing you between weeks 2-5. tren ace my nuts started shrinking week 2.. probably because of the short ester and its pretty strong androgenic stuff . i have never ran beastdrol alone, i've always stacked it so i cannot tell you how fast it suppresses you vs. deca/test. the bottom line is always run a PCT ..