Estimated time to brute force a password:
uppercase and lowercase letters only, 16 characters, 2bn years
numbers, uppercase and lowercase letters, symbols, 14 characters, 200m years.
(source: hivesystems.io)
So SiameseBeesTesla is "stronger" to brute force attack by virtue of the longer length. That is in fact the main reason that "3 words" password construction is widely recommended now - it encourages much longer passwords than the typically still 8 enforced numbers, upper, lower, and special mix (est. 8 hours to brute force) which are still memorable (so not written down, less likely to be reused) and are partly robust to dictionary attacks due to the n-cubed permutations of any 3 dictionary words.
The other points with regard to repeat use etc., and other forms of attack beyond brute force (e.g. social engineering) are not addressed by the above though.