Will the Headcrab model in Half-Life: Source replace the Fast Headcrab model?

Hi, I am thinking of buying Half Life: Source, And I would like to ask, will Half-Life: Source replace my Fast Headcrab with its Headcrab model?

No not really. I doubt it would and I have it installed. Doesn’t replace anything other than adding a category to the NPCs.

Just confirming, it doesn’t.

Confirming the confirmed, it doesn’t