LaTeX equal and not equal symbols

Symbol Command
$=$ =
$\fallingdotseq$ \fallingdotseq
$\risingdotseq$ \risingdotseq
Symbol Command
$\ne$ \ne
$\not$ \not
$\neq$ \neq

Equivalent or similar

Symbol Command
$\equiv$ \equiv
$\sim$ \sim
$\approx$ \approx
$\cong$ \cong
$\simeq$ \simeq
Symbol Command
$\nsim$ \nsim
$\ncong$ \ncong

LaTeX comparison

LaTeX