Step 1: Understanding colloids.
Colloids are classified into two categories based on the interaction of dispersed phase with dispersion medium: lyophilic (solvent-loving) and lyophobic (solvent-hating). Step 2: Differences.
\begin{tabular}{|c|c|c|}
\hline
Property & Lyophilic Colloids & Lyophobic Colloids
\hline
Affinity for medium & High affinity for dispersion medium & Little or no affinity for medium
\hline
Stability & Very stable and not easily coagulated & Unstable and easily coagulated
\hline
Reversibility & Reversible sols & Irreversible sols
\hline
Examples & Starch sol, Gum, Gelatin & Gold sol, Sulphur sol, As$_2$S$_3$ sol
\hline
Preparation & Form spontaneously & Require special methods
\hline
\end{tabular}
Conclusion:
Lyophilic colloids are stable and reversible due to strong attraction for solvent, while lyophobic colloids are unstable, irreversible and need stabilizers for existence.
