Understanding “bitmap heap scan” and “seq scan”
The planner thinks the bitmap scan is faster.  If you want to know which is actually faster, run them and see.  To get the best info, turn on track_io_timing and run the query with EXPLAIN (ANALYZE, BUFFERS).  If your system has slow clock access, you might want to add TIMING OFF.

There is no magic source of truth we can reveal to you just by looking at your post.  If there were, we would make the planner use it; and then it would never be wrong.